CA2124154C - Dental modeling simulator - Google Patents
Dental modeling simulator Download PDFInfo
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- CA2124154C CA2124154C CA002124154A CA2124154A CA2124154C CA 2124154 C CA2124154 C CA 2124154C CA 002124154 A CA002124154 A CA 002124154A CA 2124154 A CA2124154 A CA 2124154A CA 2124154 C CA2124154 C CA 2124154C
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- impression
- teeth
- mandibular
- plane
- maxillary
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C9/00—Impression cups, i.e. impression trays; Impression methods
- A61C9/004—Means or methods for taking digitized impressions
- A61C9/0046—Data acquisition means or methods
- A61C9/0053—Optical means or methods, e.g. scanning the teeth by a laser or light beam
-
- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
- G16H30/00—ICT specially adapted for the handling or processing of medical images
Abstract
A three-dimensional model of the teeth of a patient is prepared by taking molded impressions of the mandibular and maxillar teeth, placing separately the impressions on a support table define an X-Y plane and detecting the Z distance from a probe by directing a beam of laser light onto the impression and calculating from the pattern of reflected light a centre of the light falling on an area array. The scanning in the X-Y plane is effected continuously and is limited by datum points defining a dental arch. The impression is then tilted and the process repeated and information correlated to provide the three-dimensional model. A partial impression is then taken of both mandibular and maxillar teeth in comparison with datum points to provide information concerning the bite (occlusal) positions of the teeth.
This information is then compared with the full impression to simulate using the digital images movement of the jaw from an open position to the bite (occlusal) position.
This information is then compared with the full impression to simulate using the digital images movement of the jaw from an open position to the bite (occlusal) position.
Description
DENTAL MODELING SIMULATOR
This invention relates to a method for generating a three-dimensional model of the teeth and dental arch of a patient.
BACKGROUND OF THE INVENTION
Whereas in the past, material advances and improved professional manpower training largely determined improvements in the delivery of dental care, now the progressively sophisticated service demands of the public require the introduction of new technologies. To this end, an innovative technique has been developed to improve the quality and efficiency of dental diagnosis, treatment planning and evaluation, in addition to patient communication. In this technique, conventional dental impressions are digitized by a computer-controlled laser scanner.
Subsequently these data are transformed by customized computer graphics software, so that the derived three-dimensional electronic models of the teeth and dental arches can be viewed on a computer terminal from any perspective or magnification. Additional software has been developed so that these models can be modified interactively to simulate the effects of treatment prior to actual commencement on a patient. In addition, these models can be readily transmitted to others for advice and/or treatment planning approval, stored on a computer disk for future reference, and integrated with other computer-derived diagnostic data (e.g. digital radiographic or periodontal assessments) thereby facilitating the development of 'expert' systems.
Traditional hydrocolloid casts of the maxillary or mandibular dental arches are ubiquitous to many forms of dental service, due to difficulties in intraoral diagnosis, treatment planning and evaluation.
Derived from alginate, silicone or rubber-base impressions, the main applications of study casts are summarized below.
( 1 ). Orthodontics (a) Diagnosis, (i). dental arch evaluations, including relative tooth alignment and orientation (ii). functional occlusal analyses between maxillary and mandibular dentition's, including analysis of wear facets and attrition (iii). evaluations of maxillary and mandibular skeletal base relationships (b) Treatment planning (i). timing of orthodontic treatment (ii). decision analysis between orthodontic and/or orthognathic surgical cases (iii). orthodontic appliance design (c) Treatment progress evaluation (d) Treatment case records (2). Prosthetic dentistry (a) Diagnosis, including the evaluation of wear and attrition facets L
This invention relates to a method for generating a three-dimensional model of the teeth and dental arch of a patient.
BACKGROUND OF THE INVENTION
Whereas in the past, material advances and improved professional manpower training largely determined improvements in the delivery of dental care, now the progressively sophisticated service demands of the public require the introduction of new technologies. To this end, an innovative technique has been developed to improve the quality and efficiency of dental diagnosis, treatment planning and evaluation, in addition to patient communication. In this technique, conventional dental impressions are digitized by a computer-controlled laser scanner.
Subsequently these data are transformed by customized computer graphics software, so that the derived three-dimensional electronic models of the teeth and dental arches can be viewed on a computer terminal from any perspective or magnification. Additional software has been developed so that these models can be modified interactively to simulate the effects of treatment prior to actual commencement on a patient. In addition, these models can be readily transmitted to others for advice and/or treatment planning approval, stored on a computer disk for future reference, and integrated with other computer-derived diagnostic data (e.g. digital radiographic or periodontal assessments) thereby facilitating the development of 'expert' systems.
Traditional hydrocolloid casts of the maxillary or mandibular dental arches are ubiquitous to many forms of dental service, due to difficulties in intraoral diagnosis, treatment planning and evaluation.
Derived from alginate, silicone or rubber-base impressions, the main applications of study casts are summarized below.
( 1 ). Orthodontics (a) Diagnosis, (i). dental arch evaluations, including relative tooth alignment and orientation (ii). functional occlusal analyses between maxillary and mandibular dentition's, including analysis of wear facets and attrition (iii). evaluations of maxillary and mandibular skeletal base relationships (b) Treatment planning (i). timing of orthodontic treatment (ii). decision analysis between orthodontic and/or orthognathic surgical cases (iii). orthodontic appliance design (c) Treatment progress evaluation (d) Treatment case records (2). Prosthetic dentistry (a) Diagnosis, including the evaluation of wear and attrition facets L
(b) Treatment planning (i). Fixed or removable appliance selection (ii). Pre-prosthetic treatment for remaining natural teeth (iiil. Pretreatment orthodontic tooth realignment (c) Appliance design (i). Abutment tooth selection (ii). Identification of potential rest seat and clasp locations (iii). Clasp design and abutment tooth location (iv). Pontic design (d) Appliance evaluation (e) Treatment case records (31. Restorative dentistry (a) Treatment planning (i). Complex cavity design (ii). Restorative material selection (b) Treatment case records (4). Pedodontic dentistry (a) Diagnosis (b) Treatment planning (c) Treatment case records (5). Periodontics (a) Diagnosis (b) Treatment planning (b) Treatment case records (6). Patient communication (a1 Status of present dentition and treatment needs (b) Treatment options (c) Treatment progress (d) Treatment case records (7). Third Party communication la) Pre-authorization insurance company assessment (b) Medico-legal documentation.
Yet reliance on study casts has hampered significant improvements to dental service quality and cost efficiency. For instance, visual appraisals of their morphologic form primarily hinge on the biased experience of the observer, whereas the alternatives of ruler, protractor or grid measurements are too restrictive to offer significant improvements to their evaluation. Whereas study cast evaluations are necessary to compensate for difficulties with in situ appraisals of the teeth and dental arches, only a fraction of their component data can be delineated by existing evaluative techniques. Dental diagnosis, treatment planning and 1 1!
evaluation therefore remains largely subjective, and this restricts their objective appraisals required for significant improvements in service quality assurance and cost containment. The primary deficiency of study cast evaluations stems from difficulties in their measurement.
Other deficiencies arise from difficulties in their storage and retrieval due to their physical bulk. Traditional study casts are also static and cannot be readily manipulated, which restricts their applications when evaluating potential treatment options and their presentation to patients.
For example, cutting and repositioning teeth on a cast is conventionally used to simulate potential orthodontic realignment options, whereas trial wax-ups on a study cast are often components of complex restorative treatment planning, including abutment tooth selection and pontic design.
In cases requiring complex occlusal rehabilitation, spot grinding or other forms of adjustment are often simulated first on study casts prior to commencing treatment on an actual patient. But all techniques involving traditional study casts are relatively crude, subjective and time-consuming, primarily due to difficulties in their precise measurement.
The complex morphologic forms of teeth and dental arches are difficult to measure with any degree of precision. Nevertheless, many techniques have been developed to measure individual or groups of teeth very accurately as a component of CAD/CAM technology applied to dentistry.
Well established in the aerospace, automotive and large manufacturing industries, computer aided manufacturing and computer aided design (CAD/CAM) have significant potential for improved quality and cost efficiency when applied to dentistry. Unfortunately the lack of accurate measurement techniques restricts their application to small complicated biological bodies such as a tooth. Since the accuracy requirements for dental diagnosis, treatment planning and evaluation are similar to precision manufacturing standards, data acquisition is the principal deficiency of current CAD/CAM dental applications. The five measurement techniques reported for CAD/CAM dental applications thus far include the following:
i. Laser probes using structured light principle, ii. Photogrammetric methods, iii. Laser range measuring probes with X-Y-Z tables, iv. Scanning laser range probes, v. Traditional mechanical coordinate measuring machines.
The CEREC System which has been developed by Brains -Brandestini Instruments of Zollikan, Switzerland (Moermann and Brandestini 1986) and is currently marketed by Siemens Dental Division, FRG (Siemens 19891 and Dr. F. Duret (1988) are both employing a specially designed hand-held probe to measure the three dimensional coordinates of a prepared tooth. The measurement probe design embraces the structured light principle. But in order to eliminate possible image artifacts from dark garnishes on the tooth's surface, saliva, debris etc., a talc and titanium oxide powder mixture combined with a wetting agent must be applied to the area to be measured. Methods to control powder thickness and the resultant masking effect on the fine cavity preparation details have yet to be reported. Due to difficulties in data acquisition and processing from the in situ use of a hand-held optical probe, a modification is using a mechanical arm to hold the probe and a partial study cast of the prepared tooth is actually measured.
The Photogrammetric principle to measure the profile of a prepared tooth cavity is a component of the proposed system developed at the University of Minnesota (Rekow 19871. A pair of stereo images are recorded on the standard film using a modified 35 mm camera with a single-rod lens attached to a laryngopharyngoscope. Major difficulties of this system include saliva and other image contaminants and the automation of tooth profile measurements from stereo images.
The commercial coordinate measuring machine (CMM) has been proposed and a very few examples have been manufactured and used in research establishments. This uses a laser range probe for non contact measurement of a cast model of the teeth of the patient. It has data acquisition rate of only a few points per minutes and more than 12 hours is required to measure a complete cast. An optical CMM (Yamamoto, 1988) with data sampling speed of 25 ms (i.e. 40 data points per sec.l has been reported with measurement accuracy in the range of 100 mm.
Approximately 1 hour is required to measure an impression. These devices are therefore of little practical value.
The scanning laser probe described by Rioux ( 1984) has very high data acquisition rate but is unfortunately very expensive. This has not been proposed for dental modeling but only for industrial operations. This device uses a highly complex moving mirror arrangement to effect the scanning and this leads to the very high cost which makes it completely impractical for the present requirements.
Using traditional coordinate measuring machine or a miniature mechanical arm to capture data from stone dies has been proposed by many researchers (Rekow, 1992). Major disadvantages of a mechanical probe include slow data acquisition speed and limited measurement resolution.
Surfaces which have radii of curvature or depression less than the mechanical probe tip radius cannot be detected. With probe tip diameters less than 0.5 mm, their mechanical integrity difficult to maintain, in addition to their potential for surface damage.
As all reported measurement systems suffer from serious deficiencies, none can be considered a viable clinical instrument. Capital costs (laser scanning probe), difficulty in usage (mechanical probe), inaccuracy (optical probe and mechanical probe) or speed (mechanical CMM) limit their routine application for diagnosis, treatment planning or evaluation.
There remains therefore a high requirement for a dental modeling system in view of the following major advantages:
(1). Prior treatment planning simulation (a). Simulation of major and minor orthodontic tooth movement facilitates objective appliance design and subsequent evaluation ~1~ ~~
Yet reliance on study casts has hampered significant improvements to dental service quality and cost efficiency. For instance, visual appraisals of their morphologic form primarily hinge on the biased experience of the observer, whereas the alternatives of ruler, protractor or grid measurements are too restrictive to offer significant improvements to their evaluation. Whereas study cast evaluations are necessary to compensate for difficulties with in situ appraisals of the teeth and dental arches, only a fraction of their component data can be delineated by existing evaluative techniques. Dental diagnosis, treatment planning and 1 1!
evaluation therefore remains largely subjective, and this restricts their objective appraisals required for significant improvements in service quality assurance and cost containment. The primary deficiency of study cast evaluations stems from difficulties in their measurement.
Other deficiencies arise from difficulties in their storage and retrieval due to their physical bulk. Traditional study casts are also static and cannot be readily manipulated, which restricts their applications when evaluating potential treatment options and their presentation to patients.
For example, cutting and repositioning teeth on a cast is conventionally used to simulate potential orthodontic realignment options, whereas trial wax-ups on a study cast are often components of complex restorative treatment planning, including abutment tooth selection and pontic design.
In cases requiring complex occlusal rehabilitation, spot grinding or other forms of adjustment are often simulated first on study casts prior to commencing treatment on an actual patient. But all techniques involving traditional study casts are relatively crude, subjective and time-consuming, primarily due to difficulties in their precise measurement.
The complex morphologic forms of teeth and dental arches are difficult to measure with any degree of precision. Nevertheless, many techniques have been developed to measure individual or groups of teeth very accurately as a component of CAD/CAM technology applied to dentistry.
Well established in the aerospace, automotive and large manufacturing industries, computer aided manufacturing and computer aided design (CAD/CAM) have significant potential for improved quality and cost efficiency when applied to dentistry. Unfortunately the lack of accurate measurement techniques restricts their application to small complicated biological bodies such as a tooth. Since the accuracy requirements for dental diagnosis, treatment planning and evaluation are similar to precision manufacturing standards, data acquisition is the principal deficiency of current CAD/CAM dental applications. The five measurement techniques reported for CAD/CAM dental applications thus far include the following:
i. Laser probes using structured light principle, ii. Photogrammetric methods, iii. Laser range measuring probes with X-Y-Z tables, iv. Scanning laser range probes, v. Traditional mechanical coordinate measuring machines.
The CEREC System which has been developed by Brains -Brandestini Instruments of Zollikan, Switzerland (Moermann and Brandestini 1986) and is currently marketed by Siemens Dental Division, FRG (Siemens 19891 and Dr. F. Duret (1988) are both employing a specially designed hand-held probe to measure the three dimensional coordinates of a prepared tooth. The measurement probe design embraces the structured light principle. But in order to eliminate possible image artifacts from dark garnishes on the tooth's surface, saliva, debris etc., a talc and titanium oxide powder mixture combined with a wetting agent must be applied to the area to be measured. Methods to control powder thickness and the resultant masking effect on the fine cavity preparation details have yet to be reported. Due to difficulties in data acquisition and processing from the in situ use of a hand-held optical probe, a modification is using a mechanical arm to hold the probe and a partial study cast of the prepared tooth is actually measured.
The Photogrammetric principle to measure the profile of a prepared tooth cavity is a component of the proposed system developed at the University of Minnesota (Rekow 19871. A pair of stereo images are recorded on the standard film using a modified 35 mm camera with a single-rod lens attached to a laryngopharyngoscope. Major difficulties of this system include saliva and other image contaminants and the automation of tooth profile measurements from stereo images.
The commercial coordinate measuring machine (CMM) has been proposed and a very few examples have been manufactured and used in research establishments. This uses a laser range probe for non contact measurement of a cast model of the teeth of the patient. It has data acquisition rate of only a few points per minutes and more than 12 hours is required to measure a complete cast. An optical CMM (Yamamoto, 1988) with data sampling speed of 25 ms (i.e. 40 data points per sec.l has been reported with measurement accuracy in the range of 100 mm.
Approximately 1 hour is required to measure an impression. These devices are therefore of little practical value.
The scanning laser probe described by Rioux ( 1984) has very high data acquisition rate but is unfortunately very expensive. This has not been proposed for dental modeling but only for industrial operations. This device uses a highly complex moving mirror arrangement to effect the scanning and this leads to the very high cost which makes it completely impractical for the present requirements.
Using traditional coordinate measuring machine or a miniature mechanical arm to capture data from stone dies has been proposed by many researchers (Rekow, 1992). Major disadvantages of a mechanical probe include slow data acquisition speed and limited measurement resolution.
Surfaces which have radii of curvature or depression less than the mechanical probe tip radius cannot be detected. With probe tip diameters less than 0.5 mm, their mechanical integrity difficult to maintain, in addition to their potential for surface damage.
As all reported measurement systems suffer from serious deficiencies, none can be considered a viable clinical instrument. Capital costs (laser scanning probe), difficulty in usage (mechanical probe), inaccuracy (optical probe and mechanical probe) or speed (mechanical CMM) limit their routine application for diagnosis, treatment planning or evaluation.
There remains therefore a high requirement for a dental modeling system in view of the following major advantages:
(1). Prior treatment planning simulation (a). Simulation of major and minor orthodontic tooth movement facilitates objective appliance design and subsequent evaluation ~1~ ~~
of treatment progress (b1. Simulation of occlusal rehabilitation with/or without simultaneous orthodontic or prosthodontic treatment would facilitate discrimination between organic and functional occlusal disharmonies and enhance quality assurance in treatment planning (c). Simulation of cosmetic, restorative or prosthodontic treatment would enhance the potential for quality assurance of the adjacent hard and soft tissues (d). Simulation of potential orthodontic and/or periodontal relapse prior to treatment would provide quality checks in appliance design (2). Communication (a). Electronic storage of detailed dental arch measurements would facilitate instantaneous model referral for advice and consultation (Third Party, specialist etc.) (b). Dental arch three-dimensional simulations would provide excellent professional patient communication media to explain potential treatment options and their rationale for selection (3). Overhead cost reduction (a). As detailed dental arch dimensions can be stored on an office computer, the tatter's increased utilization will facilitate service _ 212415 to cost containment - The planned system for laser scanning and model simulations will be designed to utilize a standard dental office computer system (b). Enhanced quality assurance prior to treatment will reduce the potential for relapse and/or failure (c). By elimination the need for model storage, electronic dental arch data storage will facilitate record retrieval and archiving efficiency.
SUMMARY OF THE INVENTION
It is one object of the present invention to provide a method for generating a three-dimensional model of the teeth and dental arch of a patient.
According to the invention therefore there is provided a method of generating for manipulation a three-dimensional model of the teeth and dental arch of a patient comprising taking a molded impression of the teeth, placing the impression on a support table defining an X-Y plane, directing a beam of laser light onto the impression at a point of impact, relatively translating the beam of light and the impression in the X-Y plane so as to scan the impression with the beam to provide a plurality of points of impact each having a predetermined location in the X-Y plane, determining the distances of the points of impact of the beam with the impression in the Z
direction by detecting a pattern of light reflected from the point, and generating the digital image by correlating the locations and the distances.
One embodiment of the invention will now be described in 21~~~.~
n conjunction with the accompanying drawings, in which:
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a schematic illustration of the modeling system of the present invention, taken in side elevational view.
Figure 2 is a similar schematic illustration taken in plan view.
Figure 3 is a top plan view of an alignment tray for taking alignment impressions of the mandibular and maxillar teeth of the patient.
Figure 4 is across-sectional view along the lines 4-4 of figure 3.
Figure 5 is a schematic plan view of a holding jig for an alignment tray.
DETAILED DESCRIPTION
In Figures 1 and 2 a conventional dental arch impression tray is indicated at 10 with the tray being filled by a conventional impression mold material in which the impression of the teeth is indicated at 11. The tray is mounted on a holder 12 carried in a pivot mount member 13. The pivot mount member 13 is carried on an X-table 14 of an X-Y table system generally indicated at 15 and including a Y-table 16. The X-table includes a drive system 14A allowing carefully controlled movement in an X direction 14B. The Y table includes a drive system 16A acting to drive the Y table in a controlled manner in the Y direction 16B. The X-way table system is driven from a central control unit 17 which acts as a data acquisition and X-Y-Z controlling computer system.
The impression of the dental arch is thus scanned by using the X-Y table under very accurate control from the control system. Thus the - 21~4~~~
dental arch can be scanned by moving the Y table in discreet depth while scanning the X table back and forth within the bounds of the dental arch.
In order to set up these bounds, the operator can initially set a number of datum points indicated at 20 by moving the X-Y table under manual control.
This ensures that the scanning takes place only over the area of the dental arch.
During this scanning movement, the movement in one direction is effectively continuous so there is no need for stopping and starting of the table during the scanning action.
The measurement of the impression is effected in the Z
direction by a laser range finding system schematically indicated at 21. This comprises a laser light source 22 which generates a beam 23 of laser light directed onto the impression in the Z direction that is at right angles to the X-Y plane. A detector 24 receives light scattered from the impact of the beam with the impression. The detector includes an area array of CCD
detector elements 25 as described in more detail hereinafter. The detector elements provide information by way of a readout to the data acquisition and control system 17. In view of the continuous movement of the scanning action, the laser source is pulsed and the detection effected only during the very short pulse. As the pulse width (i.e. time span) is short and the table movement is slow, the amount of movement of the table during the pulse is very small and thus does not affect the accuracy of the detection, within reasonable bounds. For example, for a table movement speed of 25 mm/sec. which is a relative high speed for a precisiion X-Y
_ 2~24~~
table, and a pulse width 0.05 msec. which is a relative long plulse for the system, the table moves 1.25 pm only during the pulse. The typical table movement speed is 15 mm/sec and the pulse width is 0.02 msec.
The present system requires conventional dental arch impressions taken in stock or customized trays. Following conventional antiseptic procedures, the impressions are the inserted into the 12 shown schematically in Figure 1. The digitization process is subsequently automated, requiring key-board or mouse instructions to control, modify or change the resultant three-dimensional simulation on the computer terminal.
Both hard and soft-ware components are compatible with a PC-486 computer, and provision has been made for future additional input from digital radiographs and periodontal probes, in addition to other electronic patient records.
The coordinate measuring subsystem has a measurement volume of 100 x 100 x 25 mm. This volume is designed to embrace dental arch impressions from adults and children, although provision has been made to accommodate more limited dental impressions. The measuring subsystem comprises an X-Y table with 100 x 100 mm travel, whereas Z-axis measurements are derived from the laser range measuring probe mounted on a stationary platform independent from the X-Y table. The laser range measuring probe has continuous movement and position readout capability of 25 mm, although provision has been made to modify this capability to the range of 10-40 mm. The measurement region and positioning of the laser range measuring probe on the Z-axis are adjusted automatically based on feedback from the dental impression video image.
Thus the operator is required to position a targeting device on 4 to 6 points delineating the boundaries of the impression, prior to initiating the automated digitization process. Simple key-board instructions may also be required to change the specifications of the laser range measuring probe e.g. the dynamic measurement range, the measurement accuracy and the standoff, depending on the required precision of the subsequent simulation.
Since the dental impression is mounted in a standardized location on the X-Y table, the contained surface coordinates are automatically obtained from the X-Y table position indicator and the laser range data. The data acquisition rate is greatly increased by the application of customized 'measure by fly' techniques and the automatic adjustment of the X-Y table traveling speed during the continuous scanning action. This can be modulated by the operator, depending on the measurement accuracy required. The response time of the laser range measuring probe can be modified by key-board controls, in addition to tilting the X-Y table to facilitate measurement of 'obstructed' areas.
The resultant 3D data can then be stored in a computer disk, or transferred directly to a graphics software package for subsequent translation into a 3D simulation to be viewed on a computer terminal either in the dental office or some other central location.
The measured 3D dental impression coordinates are converted to simulated three-dimensional models of the maxillary or mandibular dental arches using a commercial solid modeling software package such as Auto ~~2~~~
CAD (Product of Autodesk, Inc.), but a customized solid modeling graphic software package is preferred because of unique user requirements. Such models can be viewed from any perspective or magnification by simple key-board or mouse controls, and any aspect can be printed on an office printer to facilitate appraisal by the dentist or patient. The software also allows for subsequent customized model segmentation: this facilitates the simulation of any component tooth movement determined by operator input, including extraction.
Software has also been developed whereby the maxillary and mandibular arch models can be aligned by key-board instructions so that centric relation coincides with centric occlusion. At this relationship, the points of maxillary and mandibular tooth contact can be identified with a color-code if required. There is again the potential for record keeping for future reference if required.
Further software modifications permit maxillary and mandibular arch simulations to be positioned in centric, protrusive and lateral excursive locations. This entails the use of the DMS to digitize the superior and inferior surfaces of conventional wax, polysulfone or silicone bite registrations from these three positions taken in situ. The maxillary and mandibular arch simulations can then be positioned into their respective locations on the digitized bite registration through key-board control.
Other software adaptations facilitate the following:-- ~~.~~~1~~.~
i. The translation from static to dynamic dental arch simulations.
This facility enables an operator to change the location or orientation of any tooth in the simulation, and then to move any or all other teeth independently to simulate potential treatment options for a particular patient. This facility has the potential to be included in an 'expert system'.
ii. The three-dimensional simulation derived from one impression can be subtracted from an analogous simulation derived from a subsequent impression of the same patient through simple key-board inputs. This facility enables the effects of treatment progress or relapse on a patient to be objectively delineated.
iii. By simple key-board or mouse controls, various occlusal adjustments and/or dental restorations can be included in the 3D
simulations, to facilitate potential treatment option evaluations and their communication to patients.
iv. Various options for inclusion of data derived from potential future sources have been provided for this software, i.e. the software is both versatile and user friendly. Operator manipulation options include a computer pointing device such as mouse, window icon, voice control etc., whereas the display terminal is controlled by an appropriate personnel computer such as PC-486 or equivalent.
Since the laser spot beam is generally conical in shape (circular or elliptical) with a Gaussian intensity distribution, the spot beam image will also be approximately conical shaped. When a CCD area array is used as an imaging detector, the image center can be determined more accurately by using prior knowledge of the image shape instead of the signal peak intensity position.
The detector used is an area CCD array of 512 x 32 elements.
The amplitude of each CCD element is stored at the appropriate memory using a frame grabble. The signal from the center column CCD array is processed by a voltage comparator, so that an approximate image center position is obtained. Using the approximate position as the data array center, a rectangular array, say 41 x 31, is selected, assuming that the whole spot beam image is within the selected rectangular array. The rectangular array size depends on the spot beam image size and shape.
Since the laser beam spot intensity is a Gaussian distribution function, the image will have similar distribution function, except that the amplitude at each CCD cell is proportional to the total illumination on the cell. Three different threshold levels or predetermined levels of light intensity are used to process the image and lead to three concentric images of similar shape. Each image edge is then fitted to the theoretical shape and the image center of the fitted image obtained. The resultant image center is then the average of three fitted image centers.
A special circuit board incorporating the digital signal processing chips is constructed to process the image. The laser probe using this board can measure more than 1000 points per second.
A unique, economical and fast data acquisition rate optical arrangement has therefore been designed for any dental application by using a specially designed laser range probe and a small and accurate X-Y table.
The tilt mechanism 13 is actuated after an initial scanning action to tilt the dental arch about the axis of the holder 12 which raises one side of the arch relative to the opposed side vertically away from the X-Y plane. After tilting through a predetermined distance, the scanning action is repeated following which the tilt mechanism 13 is actuated to move the dental arch to a further tilted position generally opposed to the second tilted position. A third scanning action is then completed. These three scanning actions can then be compared and the data correlated to provide a more accurate calculation of the shape of the impression. In addition the tilting action can expose areas of the impression which are obscured by overhang.
The potential applications of the present system can then be summarized in point form:
(i1. Laser scan digitization of dental arch form from dental impressions precludes the need for conventional study models.
(ii). More precise arch form and tooth orientation appraisals are facilitated by digitized dental impressions compared with traditional study casts. The component maxillary and mandibular teeth can be viewed from any perspective and/or magnification, and any dimensions can be determined from point location of the simulation.
(iii). Subtraction of digitized sequential dental impressions facilitates evaluations of treatment progress: this opens the potential for the institution of prompt remedial treatment.
(iv).The capability of modifying the three-dimensional dental arch simulations interactively facilitates prior evaluations of potential treatment options and their presentation to patients.
(v). Electronic dental models can be readily stored on computer disk, thereby facilitating filing and retrieval in addition to facilitating their communication to third parties.
(vi). An interactive modeling capabilities potentiate the develop-ment of expert diagnostic and evaluative systems for dentistry.
(vii).The specific advantages of this technology can only be cursorily summarized:
(a). Orthodontics The effects of extracting specific teeth and realignment of the remainder of the arch can be readily simulated on the computer. In addition to aiding patient communication, this capability facilitates the specific orthodontic appliance design.
Subtraction or overlay of digitized sequential impressions not only provides objective appraisals of orthodontic treatment progress, (i.e. comparison with original simulation of final arch form) but also the prompt detection of abnormalities for their remedial treatment.
(b). Occlusal rehabilitation Viewing dental arch simulations from any perspective or magnification facilitates delineation of premature cuspal interferences. The interactive modeling capability also enables the effects of cuspal modulation to be verified prior to in vivo transfer.
lc). Restorative dental treatment Veneers or other complex restorations can be planned on the three-dimensional simulations prior to commencement. In addition, success of final treatment can then be verified by subtraction of the digitized final impression from the original simulation.
(d1. Prosthodontic treatment Fixed or removable prosthodontic appliances can be designed and evaluated on the three dimensional simulation prior to construction. This capability will facilitate the delivery of cost-effective prosthodontic treatment.
(e1. Pedodontic treatment Pedodontic treatment largely involves preservation of the deciduous dentition to permit the orderly eruption of the permanent teeth. In this regard, digitization of mz~~~~~
sequential impressions will not only facilitate the early detection or premature drifting and/or rotation but also the prompt institution of remedial therapy.
(f). Periodontal treatment The ability to measure tooth movement from sequential impressions facilitates the detection of differential tooth drifting and rotation that complicates advanced periodontal destruction.
Dental study casts are traditionally aligned by using wax or other bite registrations in addition to partially integrated maxillary and mandibular dental impressions. Whereas existing clinical techniques are difficult to adapt for dental CAD systems, two modified techniques have been devised for the present system where the prime objective is precision.
Turning therefore to Figures 3 and 4, there is shown an alignment impression tray 30 with predefined identification marks 31 at upper and lower sides.
The alignment tray comprises disposable non-transparent plastic or appropriate metal with an "H" shaped cross section. The horizontal partition wall 32 of the "H" channel is extended slightly at the outside of the vertical walls 33 and the thickness of the extension is known.
Appropriate circular (or square or other simple shapes) cylindrical identification marks are positioned on the extension as shown in Figure 2.
The size, the height and the relative horizontal positions of each mark are 2~~~~~~
known. The tray thus provides upper and lower containers for the mold material 34 into which the impression 35 is made by the patient biting into the material. This acts to generate a partial impression of both the mandibular and maxillar teeth of the patient. By measuring the partial maxillary dental impression with respect to the observable marks and the partial mandibular dental impression with respect to other set of observable marks, the relative positions between partial maxillary and mandibular dental impressions can be established. The teeth used in the partial dental impression are identified, and this information is used to compare with the full impressions previously taken so that the maxillary and mandibular dental arch can be aligned from the partial impression data. this has the advantage that the measurement setup for the alignment maxillary dental impression and the alignment mandibular dental impression is independent. It has the disadvantage that the alignment dental impression tray production cost will be high.
In a second arrangement shown in Figure 5, a partial dental impression holding jig 40 is provided with predefined identification marks 41 at upper and lower sides.
Since the partial impression 43 is mounted on a measuring jig 40 both the partial mandibular impression and the partial maxillary impression can be measured by rotating the holding jig approximately 180 degree with respect to the horizontal axis. The identification marks are positioned on the holding jig 40 rotating platform surfaces since the partial dental impression does not move with respect to the platform surface during the measurement. The impression 43 is mounted in an opening 46 within the platform and is held in place by a spring 44 and a clamping nut 45. The use of the jig avoids the necessity for special alignment trays.
Since various modifications can be made in our invention as herein above described, and many apparently widely different embodiments of same made within the spirit and scope of the claims without departing from such spirit and scope, it is intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.
SUMMARY OF THE INVENTION
It is one object of the present invention to provide a method for generating a three-dimensional model of the teeth and dental arch of a patient.
According to the invention therefore there is provided a method of generating for manipulation a three-dimensional model of the teeth and dental arch of a patient comprising taking a molded impression of the teeth, placing the impression on a support table defining an X-Y plane, directing a beam of laser light onto the impression at a point of impact, relatively translating the beam of light and the impression in the X-Y plane so as to scan the impression with the beam to provide a plurality of points of impact each having a predetermined location in the X-Y plane, determining the distances of the points of impact of the beam with the impression in the Z
direction by detecting a pattern of light reflected from the point, and generating the digital image by correlating the locations and the distances.
One embodiment of the invention will now be described in 21~~~.~
n conjunction with the accompanying drawings, in which:
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a schematic illustration of the modeling system of the present invention, taken in side elevational view.
Figure 2 is a similar schematic illustration taken in plan view.
Figure 3 is a top plan view of an alignment tray for taking alignment impressions of the mandibular and maxillar teeth of the patient.
Figure 4 is across-sectional view along the lines 4-4 of figure 3.
Figure 5 is a schematic plan view of a holding jig for an alignment tray.
DETAILED DESCRIPTION
In Figures 1 and 2 a conventional dental arch impression tray is indicated at 10 with the tray being filled by a conventional impression mold material in which the impression of the teeth is indicated at 11. The tray is mounted on a holder 12 carried in a pivot mount member 13. The pivot mount member 13 is carried on an X-table 14 of an X-Y table system generally indicated at 15 and including a Y-table 16. The X-table includes a drive system 14A allowing carefully controlled movement in an X direction 14B. The Y table includes a drive system 16A acting to drive the Y table in a controlled manner in the Y direction 16B. The X-way table system is driven from a central control unit 17 which acts as a data acquisition and X-Y-Z controlling computer system.
The impression of the dental arch is thus scanned by using the X-Y table under very accurate control from the control system. Thus the - 21~4~~~
dental arch can be scanned by moving the Y table in discreet depth while scanning the X table back and forth within the bounds of the dental arch.
In order to set up these bounds, the operator can initially set a number of datum points indicated at 20 by moving the X-Y table under manual control.
This ensures that the scanning takes place only over the area of the dental arch.
During this scanning movement, the movement in one direction is effectively continuous so there is no need for stopping and starting of the table during the scanning action.
The measurement of the impression is effected in the Z
direction by a laser range finding system schematically indicated at 21. This comprises a laser light source 22 which generates a beam 23 of laser light directed onto the impression in the Z direction that is at right angles to the X-Y plane. A detector 24 receives light scattered from the impact of the beam with the impression. The detector includes an area array of CCD
detector elements 25 as described in more detail hereinafter. The detector elements provide information by way of a readout to the data acquisition and control system 17. In view of the continuous movement of the scanning action, the laser source is pulsed and the detection effected only during the very short pulse. As the pulse width (i.e. time span) is short and the table movement is slow, the amount of movement of the table during the pulse is very small and thus does not affect the accuracy of the detection, within reasonable bounds. For example, for a table movement speed of 25 mm/sec. which is a relative high speed for a precisiion X-Y
_ 2~24~~
table, and a pulse width 0.05 msec. which is a relative long plulse for the system, the table moves 1.25 pm only during the pulse. The typical table movement speed is 15 mm/sec and the pulse width is 0.02 msec.
The present system requires conventional dental arch impressions taken in stock or customized trays. Following conventional antiseptic procedures, the impressions are the inserted into the 12 shown schematically in Figure 1. The digitization process is subsequently automated, requiring key-board or mouse instructions to control, modify or change the resultant three-dimensional simulation on the computer terminal.
Both hard and soft-ware components are compatible with a PC-486 computer, and provision has been made for future additional input from digital radiographs and periodontal probes, in addition to other electronic patient records.
The coordinate measuring subsystem has a measurement volume of 100 x 100 x 25 mm. This volume is designed to embrace dental arch impressions from adults and children, although provision has been made to accommodate more limited dental impressions. The measuring subsystem comprises an X-Y table with 100 x 100 mm travel, whereas Z-axis measurements are derived from the laser range measuring probe mounted on a stationary platform independent from the X-Y table. The laser range measuring probe has continuous movement and position readout capability of 25 mm, although provision has been made to modify this capability to the range of 10-40 mm. The measurement region and positioning of the laser range measuring probe on the Z-axis are adjusted automatically based on feedback from the dental impression video image.
Thus the operator is required to position a targeting device on 4 to 6 points delineating the boundaries of the impression, prior to initiating the automated digitization process. Simple key-board instructions may also be required to change the specifications of the laser range measuring probe e.g. the dynamic measurement range, the measurement accuracy and the standoff, depending on the required precision of the subsequent simulation.
Since the dental impression is mounted in a standardized location on the X-Y table, the contained surface coordinates are automatically obtained from the X-Y table position indicator and the laser range data. The data acquisition rate is greatly increased by the application of customized 'measure by fly' techniques and the automatic adjustment of the X-Y table traveling speed during the continuous scanning action. This can be modulated by the operator, depending on the measurement accuracy required. The response time of the laser range measuring probe can be modified by key-board controls, in addition to tilting the X-Y table to facilitate measurement of 'obstructed' areas.
The resultant 3D data can then be stored in a computer disk, or transferred directly to a graphics software package for subsequent translation into a 3D simulation to be viewed on a computer terminal either in the dental office or some other central location.
The measured 3D dental impression coordinates are converted to simulated three-dimensional models of the maxillary or mandibular dental arches using a commercial solid modeling software package such as Auto ~~2~~~
CAD (Product of Autodesk, Inc.), but a customized solid modeling graphic software package is preferred because of unique user requirements. Such models can be viewed from any perspective or magnification by simple key-board or mouse controls, and any aspect can be printed on an office printer to facilitate appraisal by the dentist or patient. The software also allows for subsequent customized model segmentation: this facilitates the simulation of any component tooth movement determined by operator input, including extraction.
Software has also been developed whereby the maxillary and mandibular arch models can be aligned by key-board instructions so that centric relation coincides with centric occlusion. At this relationship, the points of maxillary and mandibular tooth contact can be identified with a color-code if required. There is again the potential for record keeping for future reference if required.
Further software modifications permit maxillary and mandibular arch simulations to be positioned in centric, protrusive and lateral excursive locations. This entails the use of the DMS to digitize the superior and inferior surfaces of conventional wax, polysulfone or silicone bite registrations from these three positions taken in situ. The maxillary and mandibular arch simulations can then be positioned into their respective locations on the digitized bite registration through key-board control.
Other software adaptations facilitate the following:-- ~~.~~~1~~.~
i. The translation from static to dynamic dental arch simulations.
This facility enables an operator to change the location or orientation of any tooth in the simulation, and then to move any or all other teeth independently to simulate potential treatment options for a particular patient. This facility has the potential to be included in an 'expert system'.
ii. The three-dimensional simulation derived from one impression can be subtracted from an analogous simulation derived from a subsequent impression of the same patient through simple key-board inputs. This facility enables the effects of treatment progress or relapse on a patient to be objectively delineated.
iii. By simple key-board or mouse controls, various occlusal adjustments and/or dental restorations can be included in the 3D
simulations, to facilitate potential treatment option evaluations and their communication to patients.
iv. Various options for inclusion of data derived from potential future sources have been provided for this software, i.e. the software is both versatile and user friendly. Operator manipulation options include a computer pointing device such as mouse, window icon, voice control etc., whereas the display terminal is controlled by an appropriate personnel computer such as PC-486 or equivalent.
Since the laser spot beam is generally conical in shape (circular or elliptical) with a Gaussian intensity distribution, the spot beam image will also be approximately conical shaped. When a CCD area array is used as an imaging detector, the image center can be determined more accurately by using prior knowledge of the image shape instead of the signal peak intensity position.
The detector used is an area CCD array of 512 x 32 elements.
The amplitude of each CCD element is stored at the appropriate memory using a frame grabble. The signal from the center column CCD array is processed by a voltage comparator, so that an approximate image center position is obtained. Using the approximate position as the data array center, a rectangular array, say 41 x 31, is selected, assuming that the whole spot beam image is within the selected rectangular array. The rectangular array size depends on the spot beam image size and shape.
Since the laser beam spot intensity is a Gaussian distribution function, the image will have similar distribution function, except that the amplitude at each CCD cell is proportional to the total illumination on the cell. Three different threshold levels or predetermined levels of light intensity are used to process the image and lead to three concentric images of similar shape. Each image edge is then fitted to the theoretical shape and the image center of the fitted image obtained. The resultant image center is then the average of three fitted image centers.
A special circuit board incorporating the digital signal processing chips is constructed to process the image. The laser probe using this board can measure more than 1000 points per second.
A unique, economical and fast data acquisition rate optical arrangement has therefore been designed for any dental application by using a specially designed laser range probe and a small and accurate X-Y table.
The tilt mechanism 13 is actuated after an initial scanning action to tilt the dental arch about the axis of the holder 12 which raises one side of the arch relative to the opposed side vertically away from the X-Y plane. After tilting through a predetermined distance, the scanning action is repeated following which the tilt mechanism 13 is actuated to move the dental arch to a further tilted position generally opposed to the second tilted position. A third scanning action is then completed. These three scanning actions can then be compared and the data correlated to provide a more accurate calculation of the shape of the impression. In addition the tilting action can expose areas of the impression which are obscured by overhang.
The potential applications of the present system can then be summarized in point form:
(i1. Laser scan digitization of dental arch form from dental impressions precludes the need for conventional study models.
(ii). More precise arch form and tooth orientation appraisals are facilitated by digitized dental impressions compared with traditional study casts. The component maxillary and mandibular teeth can be viewed from any perspective and/or magnification, and any dimensions can be determined from point location of the simulation.
(iii). Subtraction of digitized sequential dental impressions facilitates evaluations of treatment progress: this opens the potential for the institution of prompt remedial treatment.
(iv).The capability of modifying the three-dimensional dental arch simulations interactively facilitates prior evaluations of potential treatment options and their presentation to patients.
(v). Electronic dental models can be readily stored on computer disk, thereby facilitating filing and retrieval in addition to facilitating their communication to third parties.
(vi). An interactive modeling capabilities potentiate the develop-ment of expert diagnostic and evaluative systems for dentistry.
(vii).The specific advantages of this technology can only be cursorily summarized:
(a). Orthodontics The effects of extracting specific teeth and realignment of the remainder of the arch can be readily simulated on the computer. In addition to aiding patient communication, this capability facilitates the specific orthodontic appliance design.
Subtraction or overlay of digitized sequential impressions not only provides objective appraisals of orthodontic treatment progress, (i.e. comparison with original simulation of final arch form) but also the prompt detection of abnormalities for their remedial treatment.
(b). Occlusal rehabilitation Viewing dental arch simulations from any perspective or magnification facilitates delineation of premature cuspal interferences. The interactive modeling capability also enables the effects of cuspal modulation to be verified prior to in vivo transfer.
lc). Restorative dental treatment Veneers or other complex restorations can be planned on the three-dimensional simulations prior to commencement. In addition, success of final treatment can then be verified by subtraction of the digitized final impression from the original simulation.
(d1. Prosthodontic treatment Fixed or removable prosthodontic appliances can be designed and evaluated on the three dimensional simulation prior to construction. This capability will facilitate the delivery of cost-effective prosthodontic treatment.
(e1. Pedodontic treatment Pedodontic treatment largely involves preservation of the deciduous dentition to permit the orderly eruption of the permanent teeth. In this regard, digitization of mz~~~~~
sequential impressions will not only facilitate the early detection or premature drifting and/or rotation but also the prompt institution of remedial therapy.
(f). Periodontal treatment The ability to measure tooth movement from sequential impressions facilitates the detection of differential tooth drifting and rotation that complicates advanced periodontal destruction.
Dental study casts are traditionally aligned by using wax or other bite registrations in addition to partially integrated maxillary and mandibular dental impressions. Whereas existing clinical techniques are difficult to adapt for dental CAD systems, two modified techniques have been devised for the present system where the prime objective is precision.
Turning therefore to Figures 3 and 4, there is shown an alignment impression tray 30 with predefined identification marks 31 at upper and lower sides.
The alignment tray comprises disposable non-transparent plastic or appropriate metal with an "H" shaped cross section. The horizontal partition wall 32 of the "H" channel is extended slightly at the outside of the vertical walls 33 and the thickness of the extension is known.
Appropriate circular (or square or other simple shapes) cylindrical identification marks are positioned on the extension as shown in Figure 2.
The size, the height and the relative horizontal positions of each mark are 2~~~~~~
known. The tray thus provides upper and lower containers for the mold material 34 into which the impression 35 is made by the patient biting into the material. This acts to generate a partial impression of both the mandibular and maxillar teeth of the patient. By measuring the partial maxillary dental impression with respect to the observable marks and the partial mandibular dental impression with respect to other set of observable marks, the relative positions between partial maxillary and mandibular dental impressions can be established. The teeth used in the partial dental impression are identified, and this information is used to compare with the full impressions previously taken so that the maxillary and mandibular dental arch can be aligned from the partial impression data. this has the advantage that the measurement setup for the alignment maxillary dental impression and the alignment mandibular dental impression is independent. It has the disadvantage that the alignment dental impression tray production cost will be high.
In a second arrangement shown in Figure 5, a partial dental impression holding jig 40 is provided with predefined identification marks 41 at upper and lower sides.
Since the partial impression 43 is mounted on a measuring jig 40 both the partial mandibular impression and the partial maxillary impression can be measured by rotating the holding jig approximately 180 degree with respect to the horizontal axis. The identification marks are positioned on the holding jig 40 rotating platform surfaces since the partial dental impression does not move with respect to the platform surface during the measurement. The impression 43 is mounted in an opening 46 within the platform and is held in place by a spring 44 and a clamping nut 45. The use of the jig avoids the necessity for special alignment trays.
Since various modifications can be made in our invention as herein above described, and many apparently widely different embodiments of same made within the spirit and scope of the claims without departing from such spirit and scope, it is intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.
Claims
CLAIMS:
(1) A method of generating for manipulation a three-dimensional digital image, suitable for display and dimensional calculation of teeth and dental arch of a patient comprising taking a molded impression of the teeth, placing the impression on a support table defining an X-Y plane, directing a beam of laser light onto the impression at a point of impact, relatively translating the beam of light and the impression in the X-Y plane so as to scan the impression with the beam to provide a plurality of points of impact each having a predetermined location in the X-Y plane, determining the distances of the points of impact of the beam with the impression in the Z direction by detecting a pattern of light reflected from the point, and generating the digital image by correlating the locations and the distances.
(2) The method according to Claim 1 wherein the relative translation is effected continuously and wherein the beam is pulsed, the pattern being detected for a respective location during the each pulse of the beam.
(3) The method according to Claim 1 wherein the beam is directed along a fixed first line transverse to the X-Y plane onto the impression so as to be confined to a limited region of the impression at the point of impact and wherein the impression is moved relative to the line.
(4) The method according to Claim 3 wherein the distance of each point is determined by providing an area array of detector elements at a predetermined position spaced from the region along a second line at an angle to the first line, the area array being arranged at a predetermined distance from the X-Y plane, and detecting on the area array light scattered by the region of the impression from the beam.
(5) The method according to Claim 4 including calculating from a pattern of the scattered light detected on the area array a theoretical center of the pattern and determining the position of the center on the array.
(6) The method according to Claim 5 wherein the center is calculated by determining a locus of predetermined light intensity less than a maximum value and by calculating a theoretical center of the locus.
(7) The method according to Claim 6 wherein a second theoretical center is calculated using a second predetermined light intensity and is compared to said theoretical center.
(8) The method according to Claim 1 including tilting the impression relative to the X-Y plane about an axis lying in the X-Y plane and repeating the steps of relatively translating the beam of light and the impression in the X-Y plane so as to scan the impression with the beam to provide a plurality of points of impact each having a predetermined location in the X-Y plane, determining the distances of the points of impact of the beam with the impression in the Z direction by detecting a pattern of light reflected from the point, and generating data relating to the three-dimensional digital image by correlating the locations and the distances.
(9) The method according to Claim 8 including tilting the impression a second time and correlating the data from three separate scans of the impression to generate said three-dimensional digital image.
(10) The method according to Claim 1 including defining in the X-Y plane a plurality of datum points relative to a dental arch shape of the impression and limiting the movement in the X-Y plane to scan substantially only the dental arch shape.
(11) The method according to Claim 1 including locating a light source and detector array in fixed position in a Z direction.
(12) The method according to Claim 1 including taking maxillary and mandibular dental impressions of the teeth of the patient, generating a digital image of each of the mandibular and maxillary impressions, taking a partial impression containing teeth from both the mandibular and maxillary teeth of the patient, generating a three-dimensional digital image of the teeth of the partial impression in association with a plurality of datum points located relative to both the teeth of the mandibular and maxillary teeth, and comparing the three-dimensional digital image of the partial impression with the three-dimensional digital image of the mandibular and maxillary impressions to locate the datum points relative to the three-dimensional digital image of the mandibular and maxillary impressions to determine the relative locations of the teeth in a bit (occlusal) position of the patient of the three-dimensional digital image of the mandibular and maxillary impressions.
(13) The method according to Claim 12 wherein the datum points are located on a dental tray carrying the impression.
(14) The method according to Claim 12 wherein the datum points are located on a support plate and wherein the impression is carried on the support plate, the impression being rotatable through an angle of the order of 180 degrees to locate the datum points firstly relative to the mandibular teeth and secondly relative to the maxillary teeth.
(15) The method according to Claim 12 including manipulating the three-dimensional digital images of the mandibular and maxillary teeth in conjunction with the datum points so as to stimulate jaw movement from an open position of the teeth to the bite (occlusal) position of the teeth.
(1) A method of generating for manipulation a three-dimensional digital image, suitable for display and dimensional calculation of teeth and dental arch of a patient comprising taking a molded impression of the teeth, placing the impression on a support table defining an X-Y plane, directing a beam of laser light onto the impression at a point of impact, relatively translating the beam of light and the impression in the X-Y plane so as to scan the impression with the beam to provide a plurality of points of impact each having a predetermined location in the X-Y plane, determining the distances of the points of impact of the beam with the impression in the Z direction by detecting a pattern of light reflected from the point, and generating the digital image by correlating the locations and the distances.
(2) The method according to Claim 1 wherein the relative translation is effected continuously and wherein the beam is pulsed, the pattern being detected for a respective location during the each pulse of the beam.
(3) The method according to Claim 1 wherein the beam is directed along a fixed first line transverse to the X-Y plane onto the impression so as to be confined to a limited region of the impression at the point of impact and wherein the impression is moved relative to the line.
(4) The method according to Claim 3 wherein the distance of each point is determined by providing an area array of detector elements at a predetermined position spaced from the region along a second line at an angle to the first line, the area array being arranged at a predetermined distance from the X-Y plane, and detecting on the area array light scattered by the region of the impression from the beam.
(5) The method according to Claim 4 including calculating from a pattern of the scattered light detected on the area array a theoretical center of the pattern and determining the position of the center on the array.
(6) The method according to Claim 5 wherein the center is calculated by determining a locus of predetermined light intensity less than a maximum value and by calculating a theoretical center of the locus.
(7) The method according to Claim 6 wherein a second theoretical center is calculated using a second predetermined light intensity and is compared to said theoretical center.
(8) The method according to Claim 1 including tilting the impression relative to the X-Y plane about an axis lying in the X-Y plane and repeating the steps of relatively translating the beam of light and the impression in the X-Y plane so as to scan the impression with the beam to provide a plurality of points of impact each having a predetermined location in the X-Y plane, determining the distances of the points of impact of the beam with the impression in the Z direction by detecting a pattern of light reflected from the point, and generating data relating to the three-dimensional digital image by correlating the locations and the distances.
(9) The method according to Claim 8 including tilting the impression a second time and correlating the data from three separate scans of the impression to generate said three-dimensional digital image.
(10) The method according to Claim 1 including defining in the X-Y plane a plurality of datum points relative to a dental arch shape of the impression and limiting the movement in the X-Y plane to scan substantially only the dental arch shape.
(11) The method according to Claim 1 including locating a light source and detector array in fixed position in a Z direction.
(12) The method according to Claim 1 including taking maxillary and mandibular dental impressions of the teeth of the patient, generating a digital image of each of the mandibular and maxillary impressions, taking a partial impression containing teeth from both the mandibular and maxillary teeth of the patient, generating a three-dimensional digital image of the teeth of the partial impression in association with a plurality of datum points located relative to both the teeth of the mandibular and maxillary teeth, and comparing the three-dimensional digital image of the partial impression with the three-dimensional digital image of the mandibular and maxillary impressions to locate the datum points relative to the three-dimensional digital image of the mandibular and maxillary impressions to determine the relative locations of the teeth in a bit (occlusal) position of the patient of the three-dimensional digital image of the mandibular and maxillary impressions.
(13) The method according to Claim 12 wherein the datum points are located on a dental tray carrying the impression.
(14) The method according to Claim 12 wherein the datum points are located on a support plate and wherein the impression is carried on the support plate, the impression being rotatable through an angle of the order of 180 degrees to locate the datum points firstly relative to the mandibular teeth and secondly relative to the maxillary teeth.
(15) The method according to Claim 12 including manipulating the three-dimensional digital images of the mandibular and maxillary teeth in conjunction with the datum points so as to stimulate jaw movement from an open position of the teeth to the bite (occlusal) position of the teeth.
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111412834A (en) * | 2020-04-08 | 2020-07-14 | 昆明超泰经贸有限公司 | Tobacco bale paper indentation data detection system and detection method thereof |
Families Citing this family (394)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5623582A (en) | 1994-07-14 | 1997-04-22 | Immersion Human Interface Corporation | Computer interface or control input device for laparoscopic surgical instrument and other elongated mechanical objects |
CA2156141A1 (en) * | 1994-09-28 | 1996-03-29 | Kaveh Azar | Interactive scanning device or system |
US5766006A (en) * | 1995-06-26 | 1998-06-16 | Murljacic; Maryann Lehmann | Tooth shade analyzer system and methods |
JPH09238963A (en) * | 1996-03-07 | 1997-09-16 | Nikon Corp | Simulation method for motion of jaws |
US6929481B1 (en) | 1996-09-04 | 2005-08-16 | Immersion Medical, Inc. | Interface device and method for interfacing instruments to medical procedure simulation systems |
US6106301A (en) * | 1996-09-04 | 2000-08-22 | Ht Medical Systems, Inc. | Interventional radiology interface apparatus and method |
US7815436B2 (en) | 1996-09-04 | 2010-10-19 | Immersion Corporation | Surgical simulation interface device and method |
ES2113327B1 (en) * | 1996-11-06 | 1999-01-01 | Navimetric S L | DENTAL SCANNING PROCEDURE. |
US6217334B1 (en) * | 1997-01-28 | 2001-04-17 | Iris Development Corporation | Dental scanning method and apparatus |
US6705863B2 (en) * | 1997-06-20 | 2004-03-16 | Align Technology, Inc. | Attachment devices and methods for a dental appliance |
US5975893A (en) † | 1997-06-20 | 1999-11-02 | Align Technology, Inc. | Method and system for incrementally moving teeth |
US7063532B1 (en) * | 1997-06-20 | 2006-06-20 | Align Technology, Inc. | Subdividing a digital dentition model |
US6409504B1 (en) * | 1997-06-20 | 2002-06-25 | Align Technology, Inc. | Manipulating a digital dentition model to form models of individual dentition components |
US6450807B1 (en) | 1997-06-20 | 2002-09-17 | Align Technology, Inc. | System and method for positioning teeth |
AU744385B2 (en) * | 1997-06-20 | 2002-02-21 | Align Technology, Inc. | Method and system for incrementally moving teeth |
US8496474B2 (en) | 1997-06-20 | 2013-07-30 | Align Technology, Inc. | Computer automated development of an orthodontic treatment plan and appliance |
US6471511B1 (en) | 1997-06-20 | 2002-10-29 | Align Technology, Inc. | Defining tooth-moving appliances computationally |
US7247021B2 (en) * | 1997-06-20 | 2007-07-24 | Align Technology, Inc. | Subdividing a digital dentition model |
US6152731A (en) | 1997-09-22 | 2000-11-28 | 3M Innovative Properties Company | Methods for use in dental articulation |
IL122807A0 (en) | 1997-12-30 | 1998-08-16 | Cadent Ltd | Virtual orthodontic treatment |
US9084653B2 (en) * | 1998-01-14 | 2015-07-21 | Cadent, Ltd. | Methods for use in dental articulation |
US6470302B1 (en) | 1998-01-28 | 2002-10-22 | Immersion Medical, Inc. | Interface device and method for interfacing instruments to vascular access simulation systems |
EP1103041B1 (en) | 1998-01-28 | 2016-03-23 | Immersion Medical, Inc. | Interface device and method for interfacing instruments to medical procedure simulation system |
US6089868A (en) * | 1998-05-14 | 2000-07-18 | 3M Innovative Properties Company | Selection of orthodontic appliances |
IL125659A (en) * | 1998-08-05 | 2002-09-12 | Cadent Ltd | Method and apparatus for imaging three-dimensional structure |
EP1042994A4 (en) * | 1998-09-24 | 2006-08-09 | Nissan Digital Process Ltd | Tooth shape impression recording member and method of using it |
US6514074B1 (en) | 1999-05-14 | 2003-02-04 | Align Technology, Inc. | Digitally modeling the deformation of gingival |
US11026768B2 (en) * | 1998-10-08 | 2021-06-08 | Align Technology, Inc. | Dental appliance reinforcement |
US6802713B1 (en) | 1998-10-08 | 2004-10-12 | Align Technology, Inc. | Defining tooth-moving appliances computationally |
JP3641208B2 (en) | 1998-10-08 | 2005-04-20 | アライン テクノロジー, インコーポレイテッド | Computerized dental treatment planning and instrument development |
US6227850B1 (en) * | 1999-05-13 | 2001-05-08 | Align Technology, Inc. | Teeth viewing system |
EP1043959A4 (en) | 1998-11-03 | 2003-07-02 | Shade Analyzing Technologies Inc | Interactive dental restorative network |
US8790118B2 (en) * | 1998-11-03 | 2014-07-29 | Shade Analyzing Technologies, Inc. | Interactive dental restorative network |
WO2000032132A1 (en) | 1998-11-30 | 2000-06-08 | Align Technology, Inc. | Attachment devices and methods for a dental appliance |
US20020192617A1 (en) * | 2000-04-25 | 2002-12-19 | Align Technology, Inc. | Embedded features and methods of a dental appliance |
US7121825B2 (en) * | 1998-11-30 | 2006-10-17 | Align Technology, Inc. | Tooth positioning appliances and systems |
US6406292B1 (en) | 1999-05-13 | 2002-06-18 | Align Technology, Inc. | System for determining final position of teeth |
US6572372B1 (en) | 2000-04-25 | 2003-06-03 | Align Technology, Inc. | Embedded features and methods of a dental appliance |
US7108508B2 (en) * | 1998-12-04 | 2006-09-19 | Align Technology, Inc. | Manipulable dental model system for fabrication of a dental appliance |
US7357636B2 (en) * | 2002-02-28 | 2008-04-15 | Align Technology, Inc. | Manipulable dental model system for fabrication of a dental appliance |
WO2000033759A1 (en) | 1998-12-04 | 2000-06-15 | Align Technology, Inc. | Reconfigurable dental model system for fabrication of dental appliances |
US6488499B1 (en) * | 2000-04-25 | 2002-12-03 | Align Technology, Inc. | Methods for correcting deviations in preplanned tooth rearrangements |
US6123544A (en) * | 1998-12-18 | 2000-09-26 | 3M Innovative Properties Company | Method and apparatus for precise bond placement of orthodontic appliances |
AU2506800A (en) * | 1999-01-15 | 2000-08-01 | Align Technology, Inc. | System and method for producing tooth movement |
US6431870B1 (en) | 1999-11-30 | 2002-08-13 | Ora Metrix, Inc. | Method and apparatus for generating a desired three-dimensional digital model of an orthodontic structure |
US6512994B1 (en) | 1999-11-30 | 2003-01-28 | Orametrix, Inc. | Method and apparatus for producing a three-dimensional digital model of an orthodontic patient |
US7068825B2 (en) * | 1999-03-08 | 2006-06-27 | Orametrix, Inc. | Scanning system and calibration method for capturing precise three-dimensional information of objects |
US6851949B1 (en) | 1999-11-30 | 2005-02-08 | Orametrix, Inc. | Method and apparatus for generating a desired three-dimensional digital model of an orthodontic structure |
KR100338974B1 (en) * | 1999-03-15 | 2002-05-31 | 최은백, 이찬경 | Simulation method for identifying bone density of mandible or maxilla and recording media storing program to perform the same |
US6318994B1 (en) | 1999-05-13 | 2001-11-20 | Align Technology, Inc | Tooth path treatment plan |
US6602070B2 (en) * | 1999-05-13 | 2003-08-05 | Align Technology, Inc. | Systems and methods for dental treatment planning |
DE19950780C2 (en) * | 1999-10-21 | 2003-06-18 | Sirona Dental Systems Gmbh | Method and device for detecting medical objects, in particular models of prepared teeth |
AU1476101A (en) | 1999-11-10 | 2001-06-06 | Implant Innovations, Inc. | Healing components for use in taking impressions and methods for making the same |
US6790040B2 (en) | 1999-11-10 | 2004-09-14 | Implant Innovations, Inc. | Healing components for use in taking impressions and methods for making the same |
US7003472B2 (en) * | 1999-11-30 | 2006-02-21 | Orametrix, Inc. | Method and apparatus for automated generation of a patient treatment plan |
US6688885B1 (en) | 1999-11-30 | 2004-02-10 | Orametrix, Inc | Method and apparatus for treating an orthodontic patient |
US6648640B2 (en) * | 1999-11-30 | 2003-11-18 | Ora Metrix, Inc. | Interactive orthodontic care system based on intra-oral scanning of teeth |
US7234937B2 (en) * | 1999-11-30 | 2007-06-26 | Orametrix, Inc. | Unified workstation for virtual craniofacial diagnosis, treatment planning and therapeutics |
US6587828B1 (en) | 1999-11-30 | 2003-07-01 | Ora Metrix, Inc. | Method and apparatus for automated generation of a patient treatment plan |
US7160110B2 (en) * | 1999-11-30 | 2007-01-09 | Orametrix, Inc. | Three-dimensional occlusal and interproximal contact detection and display using virtual tooth models |
US6736638B1 (en) | 2000-04-19 | 2004-05-18 | Orametrix, Inc. | Method and apparatus for orthodontic appliance optimization |
US6632089B2 (en) * | 1999-11-30 | 2003-10-14 | Orametrix, Inc. | Orthodontic treatment planning with user-specified simulation of tooth movement |
US7802987B1 (en) | 1999-12-17 | 2010-09-28 | Align Technology, Inc. | Methods and systems for lubricating dental appliances |
US7373286B2 (en) | 2000-02-17 | 2008-05-13 | Align Technology, Inc. | Efficient data representation of teeth model |
US6633789B1 (en) * | 2000-02-17 | 2003-10-14 | Align Technology, Inc. | Effiicient data representation of teeth model |
US6463344B1 (en) | 2000-02-17 | 2002-10-08 | Align Technology, Inc. | Efficient data representation of teeth model |
US20020188478A1 (en) * | 2000-03-24 | 2002-12-12 | Joe Breeland | Health-care systems and methods |
US7904307B2 (en) | 2000-03-24 | 2011-03-08 | Align Technology, Inc. | Health-care e-commerce systems and methods |
WO2001074268A1 (en) * | 2000-03-30 | 2001-10-11 | Align Technology, Inc. | System and method for separating three-dimensional models |
US6971873B2 (en) * | 2000-04-19 | 2005-12-06 | Orametrix, Inc. | Virtual bracket library and uses thereof in orthodontic treatment planning |
US6582229B1 (en) * | 2000-04-25 | 2003-06-24 | Align Technology, Inc. | Methods for modeling bite registration |
US6454565B2 (en) | 2000-04-25 | 2002-09-24 | Align Technology, Inc. | Systems and methods for varying elastic modulus appliances |
WO2001082192A1 (en) | 2000-04-25 | 2001-11-01 | Align Technology, Inc. | Treatment analysis systems and methods |
US6947038B1 (en) | 2000-04-27 | 2005-09-20 | Align Technology, Inc. | Systems and methods for generating an appliance with tie points |
US6621491B1 (en) | 2000-04-27 | 2003-09-16 | Align Technology, Inc. | Systems and methods for integrating 3D diagnostic data |
US7245977B1 (en) | 2000-07-20 | 2007-07-17 | Align Technology, Inc. | Systems and methods for mass customization |
US7383198B1 (en) | 2000-07-24 | 2008-06-03 | Align Technology, Inc. | Delivery information systems and methods |
US7092784B1 (en) | 2000-07-28 | 2006-08-15 | Align Technology | Systems and methods for forming an object |
US7040896B2 (en) | 2000-08-16 | 2006-05-09 | Align Technology, Inc. | Systems and methods for removing gingiva from computer tooth models |
US6386878B1 (en) | 2000-08-16 | 2002-05-14 | Align Technology, Inc. | Systems and methods for removing gingiva from teeth |
US6915178B2 (en) | 2000-09-06 | 2005-07-05 | O'brien Dental Lab, Inc. | Dental prosthesis manufacturing process, dental prosthesis pattern & dental prosthesis made thereby |
US6497574B1 (en) * | 2000-09-08 | 2002-12-24 | Align Technology, Inc. | Modified tooth positioning appliances and methods and systems for their manufacture |
US6607382B1 (en) * | 2000-09-21 | 2003-08-19 | Align Technology, Inc. | Methods and systems for concurrent tooth repositioning and substance delivery |
KR100382905B1 (en) * | 2000-10-07 | 2003-05-09 | 주식회사 케이씨아이 | 3 Dimension Scanner System for Tooth modelling |
US6386867B1 (en) * | 2000-11-30 | 2002-05-14 | Duane Milford Durbin | Method and system for imaging and modeling dental structures |
US7736147B2 (en) | 2000-10-30 | 2010-06-15 | Align Technology, Inc. | Systems and methods for bite-setting teeth models |
US6726478B1 (en) | 2000-10-30 | 2004-04-27 | Align Technology, Inc. | Systems and methods for bite-setting teeth models |
ATE555743T1 (en) | 2000-11-08 | 2012-05-15 | Straumann Inst Ag | (DENTAL) SURFACE CAPTURE AND CREATION |
US6783360B2 (en) * | 2000-12-13 | 2004-08-31 | Align Technology, Inc. | Systems and methods for positioning teeth |
US6579095B2 (en) * | 2000-12-22 | 2003-06-17 | Geodigm Corporation | Mating parts scanning and registration methods |
US7074038B1 (en) * | 2000-12-29 | 2006-07-11 | Align Technology, Inc. | Methods and systems for treating teeth |
US7580846B2 (en) | 2001-01-09 | 2009-08-25 | Align Technology, Inc. | Method and system for distributing patient referrals |
US7156655B2 (en) * | 2001-04-13 | 2007-01-02 | Orametrix, Inc. | Method and system for comprehensive evaluation of orthodontic treatment using unified workstation |
US7717708B2 (en) * | 2001-04-13 | 2010-05-18 | Orametrix, Inc. | Method and system for integrated orthodontic treatment planning using unified workstation |
US7202851B2 (en) | 2001-05-04 | 2007-04-10 | Immersion Medical Inc. | Haptic interface for palpation simulation |
US7362890B2 (en) * | 2001-05-24 | 2008-04-22 | Astra Tech Inc. | Registration of 3-D imaging of 3-D objects |
US7056123B2 (en) | 2001-07-16 | 2006-06-06 | Immersion Corporation | Interface apparatus with cable-driven force feedback and grounded actuators |
US20040202983A1 (en) * | 2001-09-28 | 2004-10-14 | Align Technology, Inc. | Method and kits for forming pontics in polymeric shell aligners |
JP2005505396A (en) * | 2001-10-16 | 2005-02-24 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | How to design a template that fits detachably on the surface of an object |
US7771195B2 (en) * | 2001-10-29 | 2010-08-10 | Align Technology, Inc. | Polar attachment devices and method for a dental appliance |
EP1449489A4 (en) * | 2001-10-31 | 2009-03-11 | Imagnosis Inc | Medical simulation apparatus and method for controlling 3-dimensional image display in the medical simulation apparatus |
US6851909B2 (en) * | 2001-12-28 | 2005-02-08 | Storage Technology Corporation | Lateral cross-cabinet access for horizontal storage library |
US6767208B2 (en) * | 2002-01-10 | 2004-07-27 | Align Technology, Inc. | System and method for positioning teeth |
US7155373B2 (en) * | 2002-02-22 | 2006-12-26 | 3M Innovative Properties Company | Selection of orthodontic brackets |
US8013853B1 (en) | 2002-03-06 | 2011-09-06 | Regents Of The University Of Minnesota | Virtual dental patient |
US6854973B2 (en) | 2002-03-14 | 2005-02-15 | Orametrix, Inc. | Method of wet-field scanning |
US6830450B2 (en) | 2002-04-18 | 2004-12-14 | Align Technology, Inc. | Systems and methods for improved engagement between aligners and teeth |
DE10218435B4 (en) * | 2002-04-25 | 2010-03-04 | Zebris Medical Gmbh | Method and device for 3-dimensional movement analysis of tooth surfaces of the upper jaw in relation to the lower jaw |
US7716024B2 (en) * | 2002-04-29 | 2010-05-11 | Geodigm Corporation | Method and apparatus for electronically generating a color dental occlusion map within electronic model images |
US20030220778A1 (en) * | 2002-04-29 | 2003-11-27 | Hultgren Bruce Willard | Method and apparatus for electronically simulating jaw function within electronic model images |
US20030207227A1 (en) * | 2002-05-02 | 2003-11-06 | Align Technology, Inc. | Systems and methods for treating patients |
US7255558B2 (en) | 2002-06-18 | 2007-08-14 | Cadent, Ltd. | Dental imaging instrument having air stream auxiliary |
US6979196B2 (en) * | 2002-06-21 | 2005-12-27 | Align Technology, Inc. | Systems and methods for automated bite-setting of tooth models |
US20040243361A1 (en) * | 2002-08-19 | 2004-12-02 | Align Technology, Inc. | Systems and methods for providing mass customization |
US7077647B2 (en) * | 2002-08-22 | 2006-07-18 | Align Technology, Inc. | Systems and methods for treatment analysis by teeth matching |
US7156661B2 (en) * | 2002-08-22 | 2007-01-02 | Align Technology, Inc. | Systems and methods for treatment analysis by teeth matching |
US20040197728A1 (en) * | 2002-09-10 | 2004-10-07 | Amir Abolfathi | Architecture for treating teeth |
US20040152036A1 (en) * | 2002-09-10 | 2004-08-05 | Amir Abolfathi | Architecture for treating teeth |
US7220124B2 (en) | 2002-10-03 | 2007-05-22 | Cadent Ltd. | Method for preparing a physical plaster model |
FR2845767B1 (en) * | 2002-10-09 | 2005-12-09 | St Microelectronics Sa | INTEGRATED DIGITAL TEMPERATURE SENSOR |
US20040121282A1 (en) * | 2002-10-09 | 2004-06-24 | Sildve Peter O. | Apparatus and method for positioning dental arch to dental articulator |
DE10394004D2 (en) * | 2002-10-18 | 2005-09-08 | Willytec Gmbh | Facilities and methods for the production of dental prostheses |
AU2003300135B2 (en) | 2002-12-31 | 2009-07-16 | D4D Technologies, Llc | Laser digitizer system for dental applications |
DE10304757B4 (en) * | 2003-02-05 | 2005-07-21 | Heraeus Kulzer Gmbh | Device and method for the production of dentures |
DE10307436A1 (en) * | 2003-02-20 | 2004-09-02 | Polytec Gmbh | Method and device for the optical measurement of a dental cast model in restorative dentistry |
US7600999B2 (en) * | 2003-02-26 | 2009-10-13 | Align Technology, Inc. | Systems and methods for fabricating a dental template |
US20040166462A1 (en) | 2003-02-26 | 2004-08-26 | Align Technology, Inc. | Systems and methods for fabricating a dental template |
US7658610B2 (en) * | 2003-02-26 | 2010-02-09 | Align Technology, Inc. | Systems and methods for fabricating a dental template with a 3-D object placement |
US20040166463A1 (en) * | 2003-02-26 | 2004-08-26 | Align Technology, Inc. | Systems and methods for combination treatments of dental patients |
AU2004223469B2 (en) * | 2003-03-24 | 2009-07-30 | D4D Technologies, Llc | Laser digitizer system for dental applications |
EP1610708B1 (en) | 2003-04-03 | 2019-11-27 | Align Technology, Inc. | Method and system for fabricating a dental coping |
EP1617759A4 (en) * | 2003-04-30 | 2009-04-22 | D4D Technologies Llc | Intra-oral imaging system |
US20050038669A1 (en) * | 2003-05-02 | 2005-02-17 | Orametrix, Inc. | Interactive unified workstation for benchmarking and care planning |
US7228191B2 (en) * | 2003-05-02 | 2007-06-05 | Geodigm Corporation | Method and apparatus for constructing crowns, bridges and implants for dental use |
US7695278B2 (en) | 2005-05-20 | 2010-04-13 | Orametrix, Inc. | Method and system for finding tooth features on a virtual three-dimensional model |
JP4571625B2 (en) * | 2003-05-05 | 2010-10-27 | ディーフォーディー テクノロジーズ エルエルシー | Imaging by optical tomography |
US7648360B2 (en) * | 2003-07-01 | 2010-01-19 | Align Technology, Inc. | Dental appliance sequence ordering system and method |
US7004754B2 (en) * | 2003-07-23 | 2006-02-28 | Orametrix, Inc. | Automatic crown and gingiva detection from three-dimensional virtual model of teeth |
US7030383B2 (en) | 2003-08-04 | 2006-04-18 | Cadent Ltd. | Speckle reduction method and apparatus |
US7342668B2 (en) * | 2003-09-17 | 2008-03-11 | D4D Technologies, Llc | High speed multiple line three-dimensional digitalization |
US7474932B2 (en) * | 2003-10-23 | 2009-01-06 | Technest Holdings, Inc. | Dental computer-aided design (CAD) methods and systems |
US7361020B2 (en) * | 2003-11-19 | 2008-04-22 | Align Technology, Inc. | Dental tray containing radiopaque materials |
DE10357699A1 (en) * | 2003-12-09 | 2005-07-28 | Degudent Gmbh | Method for determining the shape of a residual tooth area |
US7118375B2 (en) * | 2004-01-08 | 2006-10-10 | Duane Milford Durbin | Method and system for dental model occlusal determination using a replicate bite registration impression |
US20050182654A1 (en) * | 2004-02-14 | 2005-08-18 | Align Technology, Inc. | Systems and methods for providing treatment planning |
US20050186524A1 (en) * | 2004-02-24 | 2005-08-25 | Align Technology, Inc. | Arch expander |
US7333874B2 (en) | 2004-02-24 | 2008-02-19 | Cadent Ltd. | Method and system for designing and producing dental prostheses and appliances |
US7904308B2 (en) | 2006-04-18 | 2011-03-08 | Align Technology, Inc. | Method and system for providing indexing and cataloguing of orthodontic related treatment profiles and options |
US8874452B2 (en) | 2004-02-27 | 2014-10-28 | Align Technology, Inc. | Method and system for providing dynamic orthodontic assessment and treatment profiles |
US11298209B2 (en) | 2004-02-27 | 2022-04-12 | Align Technology, Inc. | Method and system for providing dynamic orthodontic assessment and treatment profiles |
US9492245B2 (en) | 2004-02-27 | 2016-11-15 | Align Technology, Inc. | Method and system for providing dynamic orthodontic assessment and treatment profiles |
DE102005009549B4 (en) * | 2004-03-02 | 2014-03-13 | Institut Straumann Ag | Surface detection fixture and surface detection method |
US7702492B2 (en) * | 2004-03-11 | 2010-04-20 | Geodigm Corporation | System and method for generating an electronic model for a dental impression having a common coordinate system |
US7824346B2 (en) * | 2004-03-11 | 2010-11-02 | Geodigm Corporation | Determining condyle displacement utilizing electronic models of dental impressions having a common coordinate system |
US7241142B2 (en) * | 2004-03-19 | 2007-07-10 | Align Technology, Inc. | Root-based tooth moving sequencing |
US8260591B2 (en) | 2004-04-29 | 2012-09-04 | Align Technology, Inc. | Dynamically specifying a view |
US20050244791A1 (en) * | 2004-04-29 | 2005-11-03 | Align Technology, Inc. | Interproximal reduction treatment planning |
US7319529B2 (en) | 2004-06-17 | 2008-01-15 | Cadent Ltd | Method and apparatus for colour imaging a three-dimensional structure |
CA2571110C (en) * | 2004-06-18 | 2012-03-20 | Dentsply International Inc. | Prescribed orthodontic activators |
KR100672819B1 (en) | 2004-06-24 | 2007-01-22 | 주식회사 케이씨아이 | Driving Apparatus for 3-Dimension Scanning System and 3-Dimension Scanning System for Tooth Modelling Using the Same |
DE102004035090A1 (en) * | 2004-07-20 | 2006-02-16 | Sirona Dental Systems Gmbh | Compensation part and method for the measurement of dental restorations |
CA2575258C (en) | 2004-07-26 | 2014-04-01 | Dentsply International Inc. | Two phase invisible orthodontics |
EP1629793A1 (en) * | 2004-08-25 | 2006-03-01 | Remedent NV | Dental appliances |
CA2839708C (en) * | 2004-09-14 | 2017-11-28 | Dentsply International Inc. | Notched pontic and system for fabricating dental appliance for use therewith |
US8899976B2 (en) | 2004-09-24 | 2014-12-02 | Align Technology, Inc. | Release agent receptacle |
US20060199145A1 (en) * | 2005-03-07 | 2006-09-07 | Liu Frank Z | Producing physical dental arch model having individually adjustable tooth models |
US20060127858A1 (en) * | 2004-12-14 | 2006-06-15 | Huafeng Wen | Producing accurate base for a dental arch model |
US7309230B2 (en) | 2004-12-14 | 2007-12-18 | Align Technology, Inc. | Preventing interference between tooth models |
US8636513B2 (en) | 2004-12-14 | 2014-01-28 | Align Technology, Inc. | Fabricating a base compatible with physical tooth models |
US20070092853A1 (en) * | 2005-10-24 | 2007-04-26 | Liu Frank Z | Multi-layer casting methods and devices |
US20060199142A1 (en) * | 2005-03-07 | 2006-09-07 | Liu Frank Z | Dental aligner for providing accurate dental treatment |
US7384266B2 (en) * | 2004-11-02 | 2008-06-10 | Align Technology, Inc. | Method and apparatus for manufacturing and constructing a physical dental arch model |
US20060093993A1 (en) * | 2004-11-02 | 2006-05-04 | Huafeng Wen | Producing a base for physical dental arch model |
US7335024B2 (en) * | 2005-02-03 | 2008-02-26 | Align Technology, Inc. | Methods for producing non-interfering tooth models |
US7922490B2 (en) * | 2004-12-14 | 2011-04-12 | Align Technology, Inc. | Base for physical dental arch model |
US20060093987A1 (en) * | 2004-11-02 | 2006-05-04 | Huafeng Wen | Producing an adjustable physical dental arch model |
US20060127860A1 (en) * | 2004-12-14 | 2006-06-15 | Huafeng Wen | Producing a base for accurately receiving dental tooth models |
US20060093982A1 (en) * | 2004-11-02 | 2006-05-04 | Huafeng Wen | Method and apparatus for manufacturing and constructing a dental aligner |
US7357634B2 (en) * | 2004-11-05 | 2008-04-15 | Align Technology, Inc. | Systems and methods for substituting virtual dental appliances |
US20060097422A1 (en) * | 2004-11-08 | 2006-05-11 | Diamond Andrew J | Method for performing surgery and appliances produced thereby |
US7862336B2 (en) | 2004-11-26 | 2011-01-04 | Cadent Ltd. | Method and system for providing feedback data useful in prosthodontic procedures associated with the intra oral cavity |
US20060115785A1 (en) | 2004-11-30 | 2006-06-01 | Chunhua Li | Systems and methods for intra-oral drug delivery |
US7819662B2 (en) * | 2004-11-30 | 2010-10-26 | Geodigm Corporation | Multi-component dental appliances and a method for constructing the same |
US7236842B2 (en) | 2004-12-02 | 2007-06-26 | Cadent Ltd. | System and method for manufacturing a dental prosthesis and a dental prosthesis manufactured thereby |
US7448514B2 (en) * | 2005-02-03 | 2008-11-11 | Align Technology, Inc. | Storage system for dental devices |
US7819659B2 (en) | 2005-04-25 | 2010-10-26 | Align Technology, Inc. | System for organizing dental aligners |
US7229283B2 (en) * | 2005-02-09 | 2007-06-12 | Pou Yuen Technology Co., Ltd. | Dental cast scanning apparatus |
JP5154955B2 (en) | 2005-03-03 | 2013-02-27 | カデント・リミテツド | Oral scanning system and method |
AU2006220803A1 (en) | 2005-03-07 | 2006-09-14 | Align Technology, Inc. | Variations of dental aligners |
US8337199B2 (en) * | 2005-03-07 | 2012-12-25 | Align Technology, Inc. | Fluid permeable dental aligner |
US8684729B2 (en) * | 2005-03-07 | 2014-04-01 | Align Technology, Inc. | Disposable dental aligner |
US7831322B2 (en) * | 2005-03-07 | 2010-11-09 | Align Technology, Inc. | Producing wrinkled dental aligner for dental treatment |
US20060275736A1 (en) * | 2005-04-22 | 2006-12-07 | Orthoclear Holdings, Inc. | Computer aided orthodontic treatment planning |
US20060275731A1 (en) | 2005-04-29 | 2006-12-07 | Orthoclear Holdings, Inc. | Treatment of teeth by aligners |
DE15161961T1 (en) | 2005-06-30 | 2015-11-26 | Biomet 3I, Llc | Process for the preparation of components of a dental implant |
US20070003900A1 (en) * | 2005-07-02 | 2007-01-04 | Miller Ross J | Systems and methods for providing orthodontic outcome evaluation |
US7555403B2 (en) | 2005-07-15 | 2009-06-30 | Cadent Ltd. | Method for manipulating a dental virtual model, method for creating physical entities based on a dental virtual model thus manipulated, and dental models thus created |
US20070026358A1 (en) * | 2005-07-26 | 2007-02-01 | Schultz Charles J | Two-phase invisible orthodontics |
US11219511B2 (en) | 2005-10-24 | 2022-01-11 | Biomet 3I, Llc | Methods for placing an implant analog in a physical model of the patient's mouth |
CN101370441B (en) | 2005-10-24 | 2013-11-13 | 拜奥美特3i有限责任公司 | Methods for manufacturing dental implant components |
US8257083B2 (en) | 2005-10-24 | 2012-09-04 | Biomet 3I, Llc | Methods for placing an implant analog in a physical model of the patient's mouth |
US7413597B2 (en) * | 2005-11-03 | 2008-08-19 | Elaine Lewis | Imaging powder for CAD/CAM device |
JP5237106B2 (en) * | 2005-11-30 | 2013-07-17 | 3シェイプ アー/エス | Impression scanning for the production of dental restorations |
EP1991939B1 (en) * | 2006-02-28 | 2018-09-05 | Ormco Corporation | Software and methods for dental treatment planning |
US7613527B2 (en) * | 2006-03-16 | 2009-11-03 | 3M Innovative Properties Company | Orthodontic prescription form, templates, and toolbar for digital orthodontics |
WO2008014461A2 (en) * | 2006-07-28 | 2008-01-31 | Optimet, Optical Metrology Ltd. | Double-sided measurement of dental objects using an optical scanner |
US8038444B2 (en) | 2006-08-30 | 2011-10-18 | Align Technology, Inc. | Automated treatment staging for teeth |
US9326831B2 (en) | 2006-10-20 | 2016-05-03 | Align Technology, Inc. | System and method for positioning three-dimensional brackets on teeth |
WO2008051129A1 (en) | 2006-10-27 | 2008-05-02 | Nobel Biocare Services Ag | A dental impression tray for use in obtaining an impression of a dental structure |
WO2008058191A2 (en) * | 2006-11-07 | 2008-05-15 | Geodigm Corporation | Sprue formers |
DE102006061134A1 (en) * | 2006-12-22 | 2008-06-26 | Aepsilon Rechteverwaltungs Gmbh | Process for the transport of dental prostheses |
DE102006061143A1 (en) * | 2006-12-22 | 2008-07-24 | Aepsilon Rechteverwaltungs Gmbh | Method, computer-readable medium and computer relating to the manufacture of dental prostheses |
US8200462B2 (en) | 2007-01-11 | 2012-06-12 | Geodigm Corporation | Dental appliances |
US20090148816A1 (en) * | 2007-01-11 | 2009-06-11 | Geodigm Corporation | Design of dental appliances |
US8382686B2 (en) * | 2007-04-17 | 2013-02-26 | Gnath Tech Dental Systems, Llc | Apparatus and method for recording mandibular movement |
EP1982652A1 (en) | 2007-04-20 | 2008-10-22 | Medicim NV | Method for deriving shape information |
US8206153B2 (en) | 2007-05-18 | 2012-06-26 | Biomet 3I, Inc. | Method for selecting implant components |
US7878805B2 (en) | 2007-05-25 | 2011-02-01 | Align Technology, Inc. | Tabbed dental appliance |
US9060829B2 (en) | 2007-06-08 | 2015-06-23 | Align Technology, Inc. | Systems and method for management and delivery of orthodontic treatment |
US8562338B2 (en) | 2007-06-08 | 2013-10-22 | Align Technology, Inc. | Treatment progress tracking and recalibration |
US8591225B2 (en) | 2008-12-12 | 2013-11-26 | Align Technology, Inc. | Tooth movement measurement by automatic impression matching |
US8075306B2 (en) | 2007-06-08 | 2011-12-13 | Align Technology, Inc. | System and method for detecting deviations during the course of an orthodontic treatment to gradually reposition teeth |
US10342638B2 (en) | 2007-06-08 | 2019-07-09 | Align Technology, Inc. | Treatment planning and progress tracking systems and methods |
US20090087808A1 (en) * | 2007-09-28 | 2009-04-02 | Reika Ortho Technologies, Inc. | Methods And Systems For Moving Teeth |
US8738394B2 (en) | 2007-11-08 | 2014-05-27 | Eric E. Kuo | Clinical data file |
US8777612B2 (en) | 2007-11-16 | 2014-07-15 | Biomet 3I, Llc | Components for use with a surgical guide for dental implant placement |
US7914283B2 (en) | 2007-12-06 | 2011-03-29 | Align Technology, Inc. | Activatable dental appliance |
US8899977B2 (en) | 2008-01-29 | 2014-12-02 | Align Technology, Inc. | Orthodontic repositioning appliances having improved geometry, methods and systems |
US8439672B2 (en) | 2008-01-29 | 2013-05-14 | Align Technology, Inc. | Method and system for optimizing dental aligner geometry |
US8108189B2 (en) | 2008-03-25 | 2012-01-31 | Align Technologies, Inc. | Reconstruction of non-visible part of tooth |
US20090254299A1 (en) * | 2008-04-04 | 2009-10-08 | Optimet, Optical Metrology Ltd. | Dental Prosthesis Fabrication Based on Local Digitization of a Temporary |
KR101485882B1 (en) | 2008-04-15 | 2015-01-26 | 바이오메트 쓰리아이 엘엘씨 | Method of creating an accurate bone and soft-tissue digital dental model |
EP2276416B1 (en) | 2008-04-16 | 2015-12-16 | Biomet 3i, LLC | Method for pre-operative visualization of instrumentation used with a surgical guide for dental implant placement |
US9492243B2 (en) | 2008-05-23 | 2016-11-15 | Align Technology, Inc. | Dental implant positioning |
US8092215B2 (en) | 2008-05-23 | 2012-01-10 | Align Technology, Inc. | Smile designer |
US9119691B2 (en) | 2008-05-23 | 2015-09-01 | Align Technology, Inc. | Orthodontic tooth movement device, systems and methods |
US8172569B2 (en) | 2008-06-12 | 2012-05-08 | Align Technology, Inc. | Dental appliance |
US9408679B2 (en) | 2008-07-03 | 2016-08-09 | Align Technology, Inc. | Method, apparatus and system for use in dental procedures |
US8509932B2 (en) | 2008-07-17 | 2013-08-13 | Cadent Ltd. | Methods, systems and accessories useful for procedures relating to dental implants |
US20100055635A1 (en) | 2008-09-02 | 2010-03-04 | Align Technology, Inc. | Shape engineered aligner - auto shaping |
US8152518B2 (en) | 2008-10-08 | 2012-04-10 | Align Technology, Inc. | Dental positioning appliance having metallic portion |
EP3406222B1 (en) | 2008-11-20 | 2021-11-10 | Align Technology, Inc. | Orthodontic systems and methods including parametric attachments |
US20100129763A1 (en) | 2008-11-24 | 2010-05-27 | Align Technology, Inc. | Sequential sports guard |
US8936463B2 (en) | 2008-11-24 | 2015-01-20 | Align Technology, Inc. | Dental appliance with simulated teeth and method for making |
US8401686B2 (en) | 2008-12-18 | 2013-03-19 | Align Technology, Inc. | Reduced registration bonding template |
US9642678B2 (en) | 2008-12-30 | 2017-05-09 | Align Technology, Inc. | Method and system for dental visualization |
US8382474B2 (en) | 2008-12-31 | 2013-02-26 | Cadent Ltd. | Dental articulator |
US8936464B2 (en) | 2009-02-24 | 2015-01-20 | Cadent Ltd. | Method, system and model for indirect bonding |
US8292617B2 (en) | 2009-03-19 | 2012-10-23 | Align Technology, Inc. | Dental wire attachment |
US8765031B2 (en) | 2009-08-13 | 2014-07-01 | Align Technology, Inc. | Method of forming a dental appliance |
GB0919352D0 (en) * | 2009-11-05 | 2009-12-23 | Third Dimension Software Ltd | Optical metrology apparatus and method |
US8708697B2 (en) | 2009-12-08 | 2014-04-29 | Align Technology, Inc. | Tactile objects for orthodontics, systems and methods |
US9211166B2 (en) | 2010-04-30 | 2015-12-15 | Align Technology, Inc. | Individualized orthodontic treatment index |
US20110269092A1 (en) | 2010-04-30 | 2011-11-03 | Align Technology, Inc. | Reinforced aligner hooks |
US9241774B2 (en) | 2010-04-30 | 2016-01-26 | Align Technology, Inc. | Patterned dental positioning appliance |
ES2665997T3 (en) * | 2010-07-12 | 2018-04-30 | Centre De Recherche Medico Dentaire Am Inc. | Method and system of dental analysis |
ES2848157T3 (en) | 2010-07-19 | 2021-08-05 | Align Technology Inc | Procedures and systems for creating and interacting with three-dimensional virtual models |
EP2462893B8 (en) | 2010-12-07 | 2014-12-10 | Biomet 3i, LLC | Universal scanning member for use on dental implant and dental implant analogs |
WO2012095851A2 (en) | 2011-01-13 | 2012-07-19 | Cadent Ltd. | Methods, systems and accessories useful for procedures relating to dental implants |
US9108338B2 (en) * | 2011-04-13 | 2015-08-18 | Align Technology, Inc. | Methods and systems for thermal forming an object |
EP3777760A1 (en) | 2011-05-16 | 2021-02-17 | Biomet 3I, LLC | Temporary abutment with combination of scanning features and provisionalization features |
US9125709B2 (en) | 2011-07-29 | 2015-09-08 | Align Technology, Inc. | Systems and methods for tracking teeth movement during orthodontic treatment |
JP4997340B1 (en) * | 2011-08-23 | 2012-08-08 | 株式会社松風 | Wear evaluation device, wear evaluation method, and wear evaluation program |
US9403238B2 (en) | 2011-09-21 | 2016-08-02 | Align Technology, Inc. | Laser cutting |
US8641414B2 (en) | 2011-10-10 | 2014-02-04 | Align Technology, Inc. | Automatic placement of precision cuts |
US8602783B2 (en) | 2011-10-21 | 2013-12-10 | Zvi Fudim | Impression gingival cuff for dental implants |
US9452032B2 (en) | 2012-01-23 | 2016-09-27 | Biomet 3I, Llc | Soft tissue preservation temporary (shell) immediate-implant abutment with biological active surface |
US9089382B2 (en) | 2012-01-23 | 2015-07-28 | Biomet 3I, Llc | Method and apparatus for recording spatial gingival soft tissue relationship to implant placement within alveolar bone for immediate-implant placement |
US9375300B2 (en) | 2012-02-02 | 2016-06-28 | Align Technology, Inc. | Identifying forces on a tooth |
US9022781B2 (en) | 2012-02-15 | 2015-05-05 | Align Technology, Inc. | Orthodontic appliances that accommodate incremental and continuous tooth movement, systems and methods |
US9375298B2 (en) | 2012-02-21 | 2016-06-28 | Align Technology, Inc. | Dental models and related methods |
US9220580B2 (en) | 2012-03-01 | 2015-12-29 | Align Technology, Inc. | Determining a dental treatment difficulty |
US9655691B2 (en) | 2012-05-14 | 2017-05-23 | Align Technology, Inc. | Multilayer dental appliances and related methods and systems |
US9414897B2 (en) | 2012-05-22 | 2016-08-16 | Align Technology, Inc. | Adjustment of tooth position in a virtual dental model |
US20140067334A1 (en) | 2012-09-06 | 2014-03-06 | Align Technology Inc. | Method and a system usable in creating a subsequent dental appliance |
US8986003B2 (en) | 2012-09-13 | 2015-03-24 | Orthoaccel Technologies, Inc. | Pearlescent white aligners |
US10813729B2 (en) | 2012-09-14 | 2020-10-27 | Biomet 3I, Llc | Temporary dental prosthesis for use in developing final dental prosthesis |
DE102012022830A1 (en) | 2012-11-23 | 2014-05-28 | Florian Draenert | Device for automated individual bending of osteosynthesis plate for bone surgery, has data processing system including software that is adapted to bone structure for controlling machine, where surface of plate is bent with respect to data |
US10617489B2 (en) | 2012-12-19 | 2020-04-14 | Align Technology, Inc. | Creating a digital dental model of a patient's teeth using interproximal information |
US9668829B2 (en) | 2012-12-19 | 2017-06-06 | Align Technology, Inc. | Methods and systems for dental procedures |
US8926328B2 (en) | 2012-12-27 | 2015-01-06 | Biomet 3I, Llc | Jigs for placing dental implant analogs in models and methods of doing the same |
US9384580B2 (en) * | 2013-02-13 | 2016-07-05 | Dental Imaging Technologies Corporation | Multiple image generation from a single patient scan |
US9839496B2 (en) | 2013-02-19 | 2017-12-12 | Biomet 3I, Llc | Patient-specific dental prosthesis and gingival contouring developed by predictive modeling |
US20160015488A1 (en) | 2013-02-20 | 2016-01-21 | Gc Europe | Precalibrated dental implant aid |
ES2910276T3 (en) | 2013-04-09 | 2022-05-12 | Biomet 3I Llc | Method of using scan data of a dental implant |
US9393087B2 (en) | 2013-08-01 | 2016-07-19 | Align Technology, Inc. | Methods and systems for generating color images |
GB201320745D0 (en) * | 2013-11-25 | 2014-01-08 | Darwood Alastair | A method and apparatus for the intraoperative production of a surgical guide |
WO2015094700A1 (en) | 2013-12-20 | 2015-06-25 | Biomet 3I, Llc | Dental system for developing custom prostheses through scanning of coded members |
EP3900664A1 (en) | 2014-01-31 | 2021-10-27 | Align Technology, Inc. | Orthodontic appliances with elastics |
US10555792B2 (en) | 2014-01-31 | 2020-02-11 | Align Technology, Inc. | Direct fabrication of orthodontic appliances with elastics |
US10537406B2 (en) | 2014-02-21 | 2020-01-21 | Align Technology, Inc. | Dental appliance with repositioning jaw elements |
US9844424B2 (en) | 2014-02-21 | 2017-12-19 | Align Technology, Inc. | Dental appliance with repositioning jaw elements |
US10299894B2 (en) | 2014-02-21 | 2019-05-28 | Align Technology, Inc. | Treatment plan specific bite adjustment structures |
WO2015140614A1 (en) | 2014-03-21 | 2015-09-24 | Align Technology, Inc. | Segmented orthodontic appliance with elastics |
MX2016014099A (en) | 2014-04-27 | 2017-07-28 | Univ New York State Res Found | Enamel products and methods of use. |
US10016262B2 (en) | 2014-06-16 | 2018-07-10 | Align Technology, Inc. | Unitary dental model |
PL3157459T3 (en) | 2014-06-20 | 2021-11-22 | Align Technology, Inc. | Elastic-coated orthodontic appliance |
CN114652466A (en) | 2014-06-20 | 2022-06-24 | 阿莱恩技术有限公司 | Orthotic with elastic layer |
US9261358B2 (en) | 2014-07-03 | 2016-02-16 | Align Technology, Inc. | Chromatic confocal system |
US9261356B2 (en) | 2014-07-03 | 2016-02-16 | Align Technology, Inc. | Confocal surface topography measurement with fixed focal positions |
US9439568B2 (en) | 2014-07-03 | 2016-09-13 | Align Technology, Inc. | Apparatus and method for measuring surface topography optically |
US10772506B2 (en) | 2014-07-07 | 2020-09-15 | Align Technology, Inc. | Apparatus for dental confocal imaging |
US9693839B2 (en) | 2014-07-17 | 2017-07-04 | Align Technology, Inc. | Probe head and apparatus for intraoral confocal imaging using polarization-retarding coatings |
US9675430B2 (en) | 2014-08-15 | 2017-06-13 | Align Technology, Inc. | Confocal imaging apparatus with curved focal surface |
US9724177B2 (en) | 2014-08-19 | 2017-08-08 | Align Technology, Inc. | Viewfinder with real-time tracking for intraoral scanning |
US9700390B2 (en) | 2014-08-22 | 2017-07-11 | Biomet 3I, Llc | Soft-tissue preservation arrangement and method |
US9660418B2 (en) | 2014-08-27 | 2017-05-23 | Align Technology, Inc. | VCSEL based low coherence emitter for confocal 3D scanner |
US10449016B2 (en) | 2014-09-19 | 2019-10-22 | Align Technology, Inc. | Arch adjustment appliance |
US9610141B2 (en) | 2014-09-19 | 2017-04-04 | Align Technology, Inc. | Arch expanding appliance |
US11147652B2 (en) | 2014-11-13 | 2021-10-19 | Align Technology, Inc. | Method for tracking, predicting, and proactively correcting malocclusion and related issues |
US9744001B2 (en) | 2014-11-13 | 2017-08-29 | Align Technology, Inc. | Dental appliance with cavity for an unerupted or erupting tooth |
US20160193014A1 (en) | 2015-01-05 | 2016-07-07 | Align Technology, Inc. | Method to modify aligner by modifying tooth position |
US10537463B2 (en) | 2015-01-13 | 2020-01-21 | Align Technology, Inc. | Systems and methods for positioning a patient's mandible in response to sleep apnea status |
US10588776B2 (en) | 2015-01-13 | 2020-03-17 | Align Technology, Inc. | Systems, methods, and devices for applying distributed forces for mandibular advancement |
US10517701B2 (en) | 2015-01-13 | 2019-12-31 | Align Technology, Inc. | Mandibular advancement and retraction via bone anchoring devices |
US10504386B2 (en) | 2015-01-27 | 2019-12-10 | Align Technology, Inc. | Training method and system for oral-cavity-imaging-and-modeling equipment |
AU2016225169B2 (en) | 2015-02-23 | 2020-05-14 | Align Technology, Inc. | Primer aligner stages for lag issue resolution in low-stage clear aligner treatments |
EP3261578B1 (en) | 2015-02-23 | 2023-08-16 | Align Technology, Inc. | System and method to manufacture aligner by modifying tooth position |
US10449018B2 (en) | 2015-03-09 | 2019-10-22 | Stephen J. Chu | Gingival ovate pontic and methods of using the same |
US11850111B2 (en) | 2015-04-24 | 2023-12-26 | Align Technology, Inc. | Comparative orthodontic treatment planning tool |
DE202015003678U1 (en) | 2015-05-26 | 2015-07-06 | Powerpore Gmbh | Device for positioning wires for implant prosthetic superstructures |
US10492888B2 (en) | 2015-07-07 | 2019-12-03 | Align Technology, Inc. | Dental materials using thermoset polymers |
US11571278B2 (en) | 2015-07-07 | 2023-02-07 | Align Technology, Inc. | Systems, apparatuses and methods for dental appliances with integrally formed features |
US11045282B2 (en) | 2015-07-07 | 2021-06-29 | Align Technology, Inc. | Direct fabrication of aligners with interproximal force coupling |
US10743964B2 (en) | 2015-07-07 | 2020-08-18 | Align Technology, Inc. | Dual aligner assembly |
US11419710B2 (en) | 2015-07-07 | 2022-08-23 | Align Technology, Inc. | Systems, apparatuses and methods for substance delivery from dental appliance |
US10874483B2 (en) | 2015-07-07 | 2020-12-29 | Align Technology, Inc. | Direct fabrication of attachment templates with adhesive |
US10959810B2 (en) | 2015-07-07 | 2021-03-30 | Align Technology, Inc. | Direct fabrication of aligners for palate expansion and other applications |
US10248883B2 (en) | 2015-08-20 | 2019-04-02 | Align Technology, Inc. | Photograph-based assessment of dental treatments and procedures |
CA3001070C (en) * | 2015-10-06 | 2023-04-04 | Radix Inc. | System and method for generating digital information and altering digital models of components with same |
US11554000B2 (en) | 2015-11-12 | 2023-01-17 | Align Technology, Inc. | Dental attachment formation structure |
US11931222B2 (en) | 2015-11-12 | 2024-03-19 | Align Technology, Inc. | Dental attachment formation structures |
US11596502B2 (en) | 2015-12-09 | 2023-03-07 | Align Technology, Inc. | Dental attachment placement structure |
US11103330B2 (en) | 2015-12-09 | 2021-08-31 | Align Technology, Inc. | Dental attachment placement structure |
US10045835B2 (en) | 2016-02-17 | 2018-08-14 | Align Technology, Inc. | Variable direction tooth attachments |
WO2017218947A1 (en) | 2016-06-17 | 2017-12-21 | Align Technology, Inc. | Intraoral appliances with sensing |
US10383705B2 (en) | 2016-06-17 | 2019-08-20 | Align Technology, Inc. | Orthodontic appliance performance monitor |
KR20230154476A (en) | 2016-07-27 | 2023-11-08 | 얼라인 테크널러지, 인크. | Intraoral scanner with dental diagnostics capabilities |
US10507087B2 (en) | 2016-07-27 | 2019-12-17 | Align Technology, Inc. | Methods and apparatuses for forming a three-dimensional volumetric model of a subject's teeth |
CN109640869A (en) | 2016-08-24 | 2019-04-16 | 阿莱恩技术有限公司 | The method for visualizing rectifier by modifying tooth position and manufacturing rectifier |
DE102016012130A1 (en) * | 2016-10-11 | 2018-04-12 | Shin-Etsu Silicones Europe B.V. | Optical scanner for dental impression, digitizing and dental model system |
CN117257492A (en) | 2016-11-04 | 2023-12-22 | 阿莱恩技术有限公司 | Method and apparatus for dental imaging |
WO2018102702A1 (en) | 2016-12-02 | 2018-06-07 | Align Technology, Inc. | Dental appliance features for speech enhancement |
EP3824843A1 (en) | 2016-12-02 | 2021-05-26 | Align Technology, Inc. | Palatal expanders and methods of expanding a palate |
US11376101B2 (en) | 2016-12-02 | 2022-07-05 | Align Technology, Inc. | Force control, stop mechanism, regulating structure of removable arch adjustment appliance |
CA3043049A1 (en) | 2016-12-02 | 2018-06-07 | Align Technology, Inc. | Methods and apparatuses for customizing rapid palatal expanders using digital models |
US10548700B2 (en) | 2016-12-16 | 2020-02-04 | Align Technology, Inc. | Dental appliance etch template |
WO2018118769A1 (en) | 2016-12-19 | 2018-06-28 | Align Technology, Inc. | Aligners with enhanced gable bends |
US11071608B2 (en) | 2016-12-20 | 2021-07-27 | Align Technology, Inc. | Matching assets in 3D treatment plans |
US10456043B2 (en) | 2017-01-12 | 2019-10-29 | Align Technology, Inc. | Compact confocal dental scanning apparatus |
US10779718B2 (en) | 2017-02-13 | 2020-09-22 | Align Technology, Inc. | Cheek retractor and mobile device holder |
EP3600130B1 (en) | 2017-03-20 | 2023-07-12 | Align Technology, Inc. | Generating a virtual depiction of an orthodontic treatment of a patient |
US10613515B2 (en) | 2017-03-31 | 2020-04-07 | Align Technology, Inc. | Orthodontic appliances including at least partially un-erupted teeth and method of forming them |
US11045283B2 (en) | 2017-06-09 | 2021-06-29 | Align Technology, Inc. | Palatal expander with skeletal anchorage devices |
US10639134B2 (en) | 2017-06-26 | 2020-05-05 | Align Technology, Inc. | Biosensor performance indicator for intraoral appliances |
WO2019006416A1 (en) | 2017-06-30 | 2019-01-03 | Align Technology, Inc. | Computer implemented method and system for designing and/or manufacturing orthodontic appliances for treating or preventing temporomandibular joint dysfunction |
US11793606B2 (en) | 2017-06-30 | 2023-10-24 | Align Technology, Inc. | Devices, systems, and methods for dental arch expansion |
US10885521B2 (en) | 2017-07-17 | 2021-01-05 | Align Technology, Inc. | Method and apparatuses for interactive ordering of dental aligners |
WO2019018784A1 (en) | 2017-07-21 | 2019-01-24 | Align Technology, Inc. | Palatal contour anchorage |
US11633268B2 (en) | 2017-07-27 | 2023-04-25 | Align Technology, Inc. | Tooth shading, transparency and glazing |
US10517482B2 (en) | 2017-07-27 | 2019-12-31 | Align Technology, Inc. | Optical coherence tomography for orthodontic aligners |
WO2019035979A1 (en) | 2017-08-15 | 2019-02-21 | Align Technology, Inc. | Buccal corridor assessment and computation |
WO2019036677A1 (en) | 2017-08-17 | 2019-02-21 | Align Technology, Inc. | Dental appliance compliance monitoring |
EP3668443B1 (en) | 2017-08-17 | 2023-06-07 | Align Technology, Inc. | Systems and methods for designing appliances for orthodontic treatment |
US10813720B2 (en) | 2017-10-05 | 2020-10-27 | Align Technology, Inc. | Interproximal reduction templates |
WO2019084326A1 (en) | 2017-10-27 | 2019-05-02 | Align Technology, Inc. | Alternative bite adjustment structures |
CN111295153B (en) | 2017-10-31 | 2023-06-16 | 阿莱恩技术有限公司 | Dental appliance with selective bite loading and controlled tip staggering |
US11737857B2 (en) | 2017-11-01 | 2023-08-29 | Align Technology, Inc. | Systems and methods for correcting malocclusions of teeth |
US11096763B2 (en) | 2017-11-01 | 2021-08-24 | Align Technology, Inc. | Automatic treatment planning |
US11534974B2 (en) | 2017-11-17 | 2022-12-27 | Align Technology, Inc. | Customized fabrication of orthodontic retainers based on patient anatomy |
CN114948315A (en) | 2017-11-30 | 2022-08-30 | 阿莱恩技术有限公司 | Sensor for monitoring oral appliance |
WO2019118876A1 (en) | 2017-12-15 | 2019-06-20 | Align Technology, Inc. | Closed loop adaptive orthodontic treatment methods and apparatuses |
US10980613B2 (en) | 2017-12-29 | 2021-04-20 | Align Technology, Inc. | Augmented reality enhancements for dental practitioners |
KR20200115580A (en) | 2018-01-26 | 2020-10-07 | 얼라인 테크널러지, 인크. | Oral diagnostic scan and tracking |
EP3743007A1 (en) | 2018-01-26 | 2020-12-02 | Align Technology, Inc. | Visual prosthetic and orthodontic treatment planning |
US11937991B2 (en) | 2018-03-27 | 2024-03-26 | Align Technology, Inc. | Dental attachment placement structure |
JP7374121B2 (en) | 2018-04-11 | 2023-11-06 | アライン テクノロジー, インコーポレイテッド | releasable palatal expander |
CN112074262B (en) | 2018-05-04 | 2024-01-16 | 阿莱恩技术有限公司 | Curable composition for high Wen Guangke-based photopolymerization process and method of preparing crosslinked polymer therefrom |
US11026766B2 (en) | 2018-05-21 | 2021-06-08 | Align Technology, Inc. | Photo realistic rendering of smile image after treatment |
US11553988B2 (en) | 2018-06-29 | 2023-01-17 | Align Technology, Inc. | Photo of a patient with new simulated smile in an orthodontic treatment review software |
WO2020005386A1 (en) | 2018-06-29 | 2020-01-02 | Align Technology, Inc. | Providing a simulated outcome of dental treatment on a patient |
US10835349B2 (en) | 2018-07-20 | 2020-11-17 | Align Technology, Inc. | Parametric blurring of colors for teeth in generated images |
CN116650153A (en) | 2019-01-03 | 2023-08-29 | 阿莱恩技术有限公司 | Automatic appliance design using robust parameter optimization method |
US11478334B2 (en) | 2019-01-03 | 2022-10-25 | Align Technology, Inc. | Systems and methods for nonlinear tooth modeling |
US11779243B2 (en) | 2019-01-07 | 2023-10-10 | Align Technology, Inc. | Customized aligner change indicator |
RU2722739C1 (en) * | 2019-02-06 | 2020-06-03 | Общество с ограниченной ответственностью "Ай Ти Эс" (ООО "Ай Ти Эс") | Diagnostic technique for current dental health |
WO2020231984A1 (en) | 2019-05-14 | 2020-11-19 | Align Technology, Inc. | Visual presentation of gingival line generated based on 3d tooth model |
CN110559091B (en) * | 2019-09-29 | 2021-02-02 | 中国人民解放军陆军军医大学第一附属医院 | Dental handpiece with auxiliary distance measuring and depth fixing functions |
US11622836B2 (en) | 2019-12-31 | 2023-04-11 | Align Technology, Inc. | Aligner stage analysis to obtain mechanical interactions of aligners and teeth for treatment planning |
GB2611627A (en) | 2020-02-26 | 2023-04-12 | Get Grin Inc | Systems and methods for remote dental monitoring |
US20220392645A1 (en) * | 2021-06-08 | 2022-12-08 | Exocad Gmbh | Automated treatment proposal |
WO2023133297A2 (en) * | 2022-01-09 | 2023-07-13 | Get-Grin Inc. | Collapsible dental scope |
US11580883B1 (en) | 2022-01-26 | 2023-02-14 | NotCo Delaware, LLC | Compact dynamic simulator of the human gastrointestinal system |
US11735067B1 (en) | 2022-03-22 | 2023-08-22 | NotCo Delaware, LLC | In vitro dynamic mouth simulator |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2525103B1 (en) * | 1982-04-14 | 1985-09-27 | Duret Francois | IMPRESSION TAKING DEVICE BY OPTICAL MEANS, PARTICULARLY FOR THE AUTOMATIC PRODUCTION OF PROSTHESES |
US4663720A (en) * | 1984-02-21 | 1987-05-05 | Francois Duret | Method of and apparatus for making a prosthesis, especially a dental prosthesis |
CH672722A5 (en) * | 1986-06-24 | 1989-12-29 | Marco Brandestini | |
DE3723555C2 (en) * | 1987-07-16 | 1994-08-11 | Steinbichler Hans | Process for the production of dentures |
-
1993
- 1993-11-22 US US08/155,134 patent/US5338198A/en not_active Expired - Fee Related
-
1994
- 1994-05-24 CA CA002124154A patent/CA2124154C/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111412834A (en) * | 2020-04-08 | 2020-07-14 | 昆明超泰经贸有限公司 | Tobacco bale paper indentation data detection system and detection method thereof |
CN111412834B (en) * | 2020-04-08 | 2022-02-08 | 昆明超泰经贸有限公司 | Method for detecting cigarette packet paper indentation data |
Also Published As
Publication number | Publication date |
---|---|
CA2124154A1 (en) | 1995-05-23 |
US5338198A (en) | 1994-08-16 |
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