US20170000591A1 - Method And Device For Manufacturing And Controlling The Conformity Of A Dental Prosthesis From Parameters Obtained With A Shade Selecting Device - Google Patents
Method And Device For Manufacturing And Controlling The Conformity Of A Dental Prosthesis From Parameters Obtained With A Shade Selecting Device Download PDFInfo
- Publication number
- US20170000591A1 US20170000591A1 US14/837,449 US201514837449A US2017000591A1 US 20170000591 A1 US20170000591 A1 US 20170000591A1 US 201514837449 A US201514837449 A US 201514837449A US 2017000591 A1 US2017000591 A1 US 2017000591A1
- Authority
- US
- United States
- Prior art keywords
- practitioner
- data
- prosthesis
- shade
- proximal end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000005259 measurement Methods 0.000 claims abstract description 8
- 238000003860 storage Methods 0.000 claims abstract description 3
- 230000003287 optical effect Effects 0.000 claims description 24
- 238000012545 processing Methods 0.000 claims description 8
- 230000000295 complement effect Effects 0.000 claims description 7
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 238000012800 visualization Methods 0.000 claims description 2
- 238000005286 illumination Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 210000002455 dental arch Anatomy 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000013507 mapping Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000008447 perception Effects 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004141 dimensional analysis Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000003100 immobilizing effect Effects 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/08—Artificial teeth; Making same
- A61C13/082—Cosmetic aspects, e.g. inlays; Determination of the colour
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
- A61B5/0004—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by the type of physiological signal transmitted
- A61B5/0013—Medical image data
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
- A61B5/0082—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes
- A61B5/0088—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes for oral or dental tissue
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
- A61C1/08—Machine parts specially adapted for dentistry
- A61C1/088—Illuminating devices or attachments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/0003—Making bridge-work, inlays, implants or the like
- A61C13/0004—Computer-assisted sizing or machining of dental prostheses
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
- G01J3/508—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors measuring the colour of teeth
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2576/00—Medical imaging apparatus involving image processing or analysis
- A61B2576/02—Medical imaging apparatus involving image processing or analysis specially adapted for a particular organ or body part
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
- A61B5/0015—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by features of the telemetry system
- A61B5/0022—Monitoring a patient using a global network, e.g. telephone networks, internet
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/1032—Determining colour for diagnostic purposes
-
- 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
- G16H30/40—ICT specially adapted for the handling or processing of medical images for processing medical images, e.g. editing
Definitions
- the present invention relates to a method and a device for manufacturing and controlling the conformity of a dental prosthesis from parameters taken intra-orally with a shade selecting device.
- the prosthesis thus remotely manufactured is sent by courier to the dental practitioner and it is necessary to deliver a prosthesis that is not only dimensionally accurate, this not being the object of the present invention, but also aesthetically perfect. It is indeed essential for a prosthesis: to be natural to the point that it is not noticed and fits perfectly. The shade in the broad sense is therefore paramount and additional information allows achieving optimal results.
- the first difficulty is precisely the shade selection.
- Shade selection entails recording a set of tooth features that aims to bring about in the most faithful way possible the appearance of the tooth.
- the tooth shade corresponds to the color of the tooth, that is to say, brightness, saturation, hue, but may also incorporate any parameter that has an effect on the appearance of the tooth such as its translucency or transparency, or even its surface condition.
- the prosthesis When manufacturing a dental prosthesis, the prosthesis must exactly match the colors of the neighboring teeth, or as close as possible, in order to go unnoticed in the patient's mouth.
- the evaluation of the shade of a tooth can be done visually by a dentist.
- the dentist performs the shade selection for manufacturing the dental prosthesis by comparing the patient's tooth to teeth in a reference color chart. Once the shades are determined, they are communicated to a dental technician to enable him to choose the pulp mixtures to be used in the manufacture of the corresponding prosthesis.
- This measurement technique is unreliable.
- the evaluation of the shade of a tooth is subjective and can vary from one practitioner to another because of the perception of the eye mechanism. This measure is also influenced by environmental factors such as the lighting conditions.
- a more objective evaluation of a tooth can be performed under a light beam using a spectrum analyzer.
- a spectrum analyzer comprises a handle and a measuring head coming into contact with the tooth to be measured, the measuring head being connected to the emission-reception means by a fiber optic bundle.
- the handle comprises a light source such as light-emitting diodes (LEDs) and the measuring head comprises light sensors.
- LEDs light-emitting diodes
- this device can only make spot measurements on the tooth.
- an imaging device for performing a mapping of the tooth.
- the captured image is then subjected to image processing such as automatic segmentation to determine a set of characteristics of the tooth.
- a shooting device comprises a measuring head and a handle.
- the head includes at least an image sensor, an optical system and an LED lighting system for illuminating the shooting area. Although it can perform a two-dimensional measurement, this device has a relatively bulky measuring head.
- Another drawback of these known devices is related to the fact that the measuring head remains stationary relative to the handle. Therefore, the use of these devices is limited to a front portion of the patient's dental arch.
- the device described below for implementing the method according to the present invention achieves a better result.
- This device aims to overcome the disadvantages of the prior art by providing a device with a very compact measuring head which allows performing a two-dimensional analysis while having access to all the teeth in the mouth. The method for manufacturing and controlling is consequently optimized.
- the tooth shade measuring device includes a housing, a handle and a measuring head, said measuring head comprising:
- the orientation assembly comprises at least a first half-shell suitable to be assembled to a second half-shell to form a hollow shell defining a cavity configured to receive said proximal end, said cavity having on its inner surface a radially projecting surface intended to cooperate with a plurality of slots having a complementary shape formed on the outer surface of the proximal end to ensure the different angular positions of the measuring head relative to the housing.
- the orientation assembly comprises a locking means for locking the measuring head in a defined angular position relative to the housing.
- FIG. 1 is a schematic perspective view of a shade selecting device according to an embodiment
- FIG. 2 is an exploded perspective view of the measuring head of the device of FIG. 1 ;
- FIG. 3 is a bottom view in section of the housing of the device of FIG. 1 ;
- FIG. 4A is a perspective view of the optical waveguide of the measuring head.
- FIG. 4B is a perspective view of the optical waveguide provided with an overmolding
- FIG. 5A illustrates a perspective view of the bent distal end of the hollow body, the tip of the distal end being provided with image acquisition means,
- FIG. 5B illustrates a perspective view of the tip of the measuring head
- FIG. 5C illustrates a perspective view of the tip attached to the extremity of the bent distal end of the hollow body
- FIG. 6 is a view of the measuring head of FIG. 2 in an assembled configuration
- FIG. 7 is a sectional view of the proximal end of the measuring head held between two half-shells of the orientation assembly of the device,
- FIG. 8 shows a block diagram of the method for manufacturing and controlling of the present invention, in the simple case of a practitioner and a dental technician, and
- FIG. 9 shows a block diagram of the method for manufacturing and controlling of the present invention, in the case of a practitioner, a dental technician and a delocalized laboratory.
- FIG. 1 shows in 1 a measuring device for acquiring a color image of a tooth or the spectral data of a tooth.
- the device comprises a gripping handle 10 topped by a housing 11 , one end of the housing 11 being provided with a measuring head 20 for acquiring spectral data or images.
- the housing 11 has a substantially parallelepipedic shape with an upper face 14 comprising a display 15 which is used to indicate in real time the data relating to the analyzed tooth generated by the measuring head 20 .
- These data can then be transmitted to the computer means of the user by Wi-Fi connection or through a USB connection to be processed by a calculation software for processing the images.
- the data is transmitted to a computer station accessible by the practitioner who performed said measure in order to integrate these data in the client's record.
- the calculation unit is integrated directly into the housing 11 that allows displaying the color map of the analyzed tooth.
- the processed data are stored directly on the computer station of the practitioner.
- Computer station means, in the remainder of this description, either a networked workstation or an isolated computer connected to the Internet cloud so as to allow a controlled and secure access to said data by authorized third parties.
- the device comprises a base 17 for placing the unit on a flat surface.
- the base 17 also includes a wired USB-type connection 13 for data transfer.
- the handle 10 comprises a housing for receiving a battery. This battery can be recharged when the device is placed on its base, via a USB connection or via a charger connected to the mains.
- the gripping handle 10 further comprises an activation button 12 of the measuring head.
- the measuring head 20 comprises a hollow body 40 oriented along a longitudinal axis 46 .
- This hollow body comprises a proximal end 48 mounted to the housing 11 and a bent distal end 49 provided with a removable tip 26 designed to come into contact with the tooth surface to be analyzed.
- the hollow body 40 also includes a passage 29 which extends from the proximal end 48 to the distal end 49 .
- the extremity 48 B of the proximal end 48 and the extremity 49 B of the distal end 49 are open.
- the measuring head 20 includes at least one light source 21 and image acquisition means, integral to the hollow body 40 .
- said at least one light source is fixed to the extremity 48 B of the proximal end 48 of the body 40 and the image acquisition means is fixed to the extremity 49 B of the distal end 49 of the body 40 .
- the latter allows transmitting the illumination light from the light source 21 from the proximal end 48 of the body to the distal end 49 of the body to illuminate the tooth surface to be analyzed.
- the device further comprises a cable 28 for transmitting data extending into the passage 29 of the body from the proximal end 48 of the body to the distal end 49 for transmitting at least one image from the distal end up to the proximal end. This cable connects in particular the acquisition means to a data processing unit.
- the hollow body 40 consists of an optical waveguide 41 for guiding the illumination light emitted from the light source to a tooth surface, surrounded by an overmolding 42 .
- the device includes an orientation assembly 50 for associating the proximal end 48 of the hollow body 40 to the housing 11 so that the measuring head 20 occupies different angular positions relative to the housing.
- This specific arrangement enables imparting to the device an additional degree of freedom to facilitate access to the teeth of the two dental arches.
- being able to guide the measuring head without changing the position and orientation of the handle 10 relative to the tooth surface to be analyzed enhances the usability of the device for the user.
- the axis XX′ of the distal end 49 of the hollow body 40 is preferably bent at an inclination angle ⁇ relative to the longitudinal axis 46 carried by the body 40 to facilitate access of the measuring head to the teeth located in the rear part of the two dental arches.
- This angle is between 10 and 60°. It is preferably equal to 45°.
- the orientation assembly 50 comprises a first half-shell 51 and a second half-shell 52 , the two half-shells being assembled to form a hollow shell defining a cavity 53 around the longitudinal axis 46 .
- the two half-shells 51 , 52 are held together by known fastening means 61 , 62 .
- the proximal end 48 of the hollow body 40 is received in the cavity 53 .
- One of the two half-shells 52 comprises a radially projecting surface 56 designed to cooperate with a plurality of slots having a complementary shape, formed on an outer surface of the proximal end 48 of the hollow body 40 to ensure the different angular positions of the measuring head 20 relative to the housing 11 .
- the proximal end 48 which has a substantially circular cross-section, is housed in the cavity 53 formed by the two half-shells 51 , 52 .
- the proximal end 48 has on its outer surface a series of seven slots numbered 57 . 1 through 57 . 7 .
- the slots 57 . 1 to 57 . 7 are distributed so as to position the measuring head in various angular positions between 0 and 270°.
- the slots are distributed in such a way that the angular increment between two positions is equal to 45°.
- the measuring head 20 is oriented in an angular position in which the projecting surface 56 is received in the slot 57 . 1 , corresponding for example to a reference angular position equal to 0°.
- the measuring head 20 is then oriented relative to this reference angular position.
- the radially projecting surface designed to cooperate with one of the slots 57 , is formed by a ball screw 55 received in a slot 54 arranged in the wall of one of the half-shells 52 of the orientation assembly.
- the ball screw 55 comprises at one end facing the interior of the cavity 53 , a ball which forms the projecting surface 56 having a shape complementary to that of the slots.
- the optical waveguide is made to rotate in order to place the ball in one of the slots.
- the ball screw 55 is also a locking means for locking the measuring head in the selected angular position.
- the proximal end 48 of the body is provided with an abutment which limits the orientation of the measuring head only between 0°, corresponding to the position illustrated in FIG. 7 , and 270°. This abutment helps prevent the measuring head from performing complete revolutions, thereby preventing the data transmission cable 28 from twisting.
- the hollow longitudinal body 40 is composed of an optical waveguide 41 and an overmolding 42 surrounding the optical waveguide 41 . Consequently, the optical waveguide 41 and the overmolding 42 include a distal end corresponding to the distal end 49 of the hollow body 40 , and a proximal end corresponding to the proximal end 48 of the hollow body 40 .
- the optical waveguide 41 allows guiding the light from the light source 21 from the proximal end 48 to the distal end 49 to illuminate a tooth surface to be analyzed.
- the passage 29 which extends from the proximal end 48 to the distal end 49 of the hollow body, allows the passage of a cable 28 for transmission of data taken by the acquisition means to a data processing unit.
- the overmolding 42 includes a set of units distributed along its outer surface and configured to allow, on the one hand, fixing the tip 26 on the extremity 49 B of the distal end 49 of the overmolding 42 , and, on the other hand, mounting the proximal end 48 in the housing 11 by means of the orientation assembly 50 .
- the units form, at a distal end of overmolding 42 , a clipping unit 43 .
- the tip 26 comprises a complementary clipping unit 26 A.
- the two units 43 and 26 A cooperate together to ensure the fixing of the movable tip 26 of the optical waveguide.
- the removable tip 26 which can be sterilized and has a time-restricted use, can thus be very easily manually mounted or removed on/from the body 40 .
- the units form a first thickened portion forming a first annular shoulder 44 and a second thickened portion 45 forming a second annular shoulder 45 .
- the first thickened portion 44 forms an abutment against which an end 14 of the housing 11 comes to rest.
- the second thickened portion 45 forms an axial positioning abutment for the body 40 when the proximal end 48 is mounted in the cavity 53 formed by the two half-shells 51 , 52 .
- the units also form a plurality of slots 57 . 1 - 57 . 7 formed on the outer surface of the overmolding 42 , at the proximal end 48 of the overmolding 42 .
- These slots are designed to cooperate with the radially projecting surface on the inner surface of the cavity 53 to ensure different angular positions of the measuring head 20 relative to the housing 11 .
- the measuring head when the measuring head is mounted in the housing 11 , as illustrated in FIG. 3 , one end of the housing 14 bears against the annular shoulder 44 of the overmolding 42 .
- the proximal end 48 is held in position in the cavity 53 formed by the two half-shells which are fixed in a slot of the housing 11 .
- the optical waveguide and the overmolding 42 are made of a lower refractive material than the material of the optical waveguide so as not to degrade the guiding conditions of the light.
- the optical waveguide is made of polymethylmethacrylate (PMMA) and the overmolding is made of polytetrafuoroethylene (PTFE).
- the optical waveguide 41 and the overmolding 42 are isolated from the outside by a metal coating to ensure proper guiding of the illumination light and the insulation of the outer light guide.
- the faces of the guide can be machined to generate units designed to optimize the illumination at the output of the guide.
- the image acquisition means comprises a sensor 24 and an optical system 22 .
- the sensor 24 is, for example, a sensor provided with a pixel array so as to provide a signal for rendering an image of the tooth or a portion of the tooth.
- the sensor is preferably a field effect sensor.
- the sensor is connected to a data processing unit.
- the illumination source 21 is fixed on a mounting bracket 27 .
- the mounting bracket 27 is adapted to be positioned on a mounting surface 47 formed on the extremity 48 B of the proximal end 48 of the overmolding 42 .
- the bracket 27 also comprises a data processing unit and a control board of the light source.
- This board can also be offset on another electronic board associated with the display electronics.
- the illumination source comprises at least one white light-emitting diode and LED light-emitting diodes, whose wavelengths range between 448 and 630 nm, attached to the mounting bracket 27 .
- the LEDs, the control board and the optical system are integral with the overmolding 42 . Thanks to this specific configuration, the sensor always sees the same distribution for a given LED. Thus, whatever the orientation of the body or of the optical waveguide 41 , the illuminating beam on the tooth surface to be analyzed is always the same.
- an optical waveguide for conveying the light of the LEDS to a surface to be analyzed allows deporting the illumination sources while providing the most homogeneous possible illumination on the surface to be analyzed and this, regardless of the LED used and the orientation of the measuring head relative to the housing.
- the optical system 22 includes a lens 25 and polarizing filters 23 .
- Mounting is achieved by setting the sensor 24 on a support piece 24 . 1 that receives an immobilizing lock 30 .
- the lens 25 is screwed to the support piece 24 . 1 by a very fine thread to adjust the focal distance very accurately.
- the support piece 24 . 1 with its sensor and bearing the lens 25 is introduced into the optical waveguide 29 and secured by any means, particularly by bonding.
- the optical system 22 includes polarizing filters 23 positioned near the distal end 26 A of the tip 26 . These filters allow eliminating the light reflected by the surface to be analyzed.
- a first glass slide and a second glass slide maintain sandwiched a first polarizing filter 23 for the emitting part and a second filter 23 for the receiving part.
- this disk 23 is attached by bonding to a glass slide which is clipped onto the end of the guide, or alternatively, the disk 23 is glued directly to the extremity 49 B of the distal end 49 of the overmolding 42 , as shown in FIG. 5A .
- FIG. 5B shows in more detail the tip 26 that has a substantially tubular shape.
- This tip is made of a material having an opaque color.
- This tip is configured to be fixed on the extremity 49 B of the distal end 49 of the overmolding 42 .
- the tip 26 comprises a distal end 26 A intended to come in contact with the tooth and a proximal end 26 B positioned near the image acquisition means.
- the distal end 26 A is separated from the proximal end 26 B by a predetermined distance corresponding to a working distance to acquire an image.
- the use of this tip allows eliminating stray light in the vicinity of the analyzed tooth.
- the tip allows precise positioning of the measuring head.
- the proximal end 26 B of the tip 26 comprises on its inner surface a clipping unit 26 C that cooperates with a clipping unit 43 formed at the distal end 49 of the overmolding 42 for securing the tip on the body.
- the tip which is for single use, can be manually mounted or removed very simply on/from the hollow body.
- the tip is in the form of a disposable cap having a tubular shape which extends the bent distal end 49 of the overmolding.
- the tip has an angle of inclination ⁇ relative to the longitudinal axis 46 of the body 40 when attached to the latter. (See FIG. 6 .)
- this tip includes a chromatic reference surface which allows the measuring device to perform an automatic self-calibration.
- the practitioner can therefore hold the device that has just been described and receive data on the tooth before proceeding with its sizing and/or caring and/or preparing.
- Processing the measured data allows determining the color of the tooth by areas, for example three areas.
- the self-calibration provides a comparison from a same reference, regardless of the device being used.
- the dental technician knows then which are the areas and which color to attribute to each of said areas so as not to have a uniform prosthesis whose aesthetic appearance would be unacceptable.
- the practitioner can also take a complementary photo to scan the environment of the tooth or teeth affected by the seating of a prosthesis.
- an application can be developed in conjunction with the data and customer information processing software to introduce these complementary photos.
- the integration of photos into a file and their addition to the transmitted data will be automatically executed so that the practitioner does not have to worry about it, the practitioner needing only to open the patient's record.
- the method of the invention consists, as shown schematically in the block diagram of FIG. 8 , in following the sequence of the following steps:
- the method includes an additional step of transmitting, from the dental technician to the practitioner this time, the data of the manufactured prosthesis, as measured with said DProthésiste, prior to sending said prosthesis, its shipment occurring only if the practitioner gives his confirmation.
- the method becomes:
- the invention also allows the practitioner to send amendments before giving his approval for the shipment of the prosthesis, see FIG. 9 .
- the block diagram becomes the following:
- the device for selecting the shade of the tooth for all the steps of the method is advantageously the device which was described above in the present invention and which comprises a swivel head, which allows selecting a much more precise shade by orienting the head of said device on said tooth followed by a measurement of said tooth parameters.
- the method also provides that, notwithstanding the quality of the exchanges of the data obtained, the practitioner make corrections, which may be related to his expertise, to the manufactured prosthesis whose data have been transmitted. Therefore, the dental technician can make changes before submitting new data on the modified prosthesis and sending the finalized prosthesis after confirmation of compliance by the practitioner.
- the method of the invention allows solving the problem raised, namely the quality control of the prosthesis by the dental technician before he sends it to the practitioner, based on measured parameters identical to the parameters measured by the practitioner.
- the practitioner can also add comments, if necessary, to ensure accurate feedback to the dental technician concerned, or make a comment on a dedicated community forum.
- the method also allows completing the data on the tooth or teeth involved at any time with data from the peripheral dental context of the tooth or teeth concerned.
- Such contextual data can be digital photos as described above, data on the material to be used or even the trademark of the ceramic powder, etc.
Abstract
A method for manufacturing and controlling the conformity of a dental prosthesis from parameters obtained intra-orally with a shade selecting device is described herein. The method includes:
-
- selecting the shade of the client tooth to be replaced or restored by the practitioner using the practitioner's shade selecting DPraticien device, with local storage of such data,
- transmitting these data to a practitioner's computer station equipped with software for visualizing the measurement data and possibly with software for entering the client's contact information and specific data, both software programs being advantageously combined,
- transmitting these data to a dental technician's computer station,
- manufacturing by the dental technician of the prosthesis according to the data received from the practitioner,
- controlling the prosthesis data using a dental technician's shade selecting DProthésiste device, self-calibrated in the same way as the DPraticien device, and
- sending the prosthesis to the practitioner.
Description
- The present invention relates to a method and a device for manufacturing and controlling the conformity of a dental prosthesis from parameters taken intra-orally with a shade selecting device.
- We know that the manufacture of dental prostheses is performed by dental technicians who are not necessarily in the vicinity of the dental practitioner's office, and can even take place in industrially oriented units in countries which are geographically quite distant from the site where they will be seated but whose labor costs are lower.
- The prosthesis thus remotely manufactured is sent by courier to the dental practitioner and it is necessary to deliver a prosthesis that is not only dimensionally accurate, this not being the object of the present invention, but also aesthetically perfect. It is indeed essential for a prosthesis: to be natural to the point that it is not noticed and fits perfectly. The shade in the broad sense is therefore paramount and additional information allows achieving optimal results.
- This is where the problems arise because it is necessary to determine parameters, not only subjectively, but also through actual, repeatable and verifiable measurements.
- Then, once these parameters are determined, it is necessary to verify that the prosthesis, once manufactured, is in conformity with these parameters so as not to deliver a prosthesis that would not fit. Poor workmanship results in significant costs because it entails:
-
- discovering the defect intra-orally, which incurs expenses because it requires an unnecessary trip for the client and unnecessary work for the practitioner,
- manufacturing a new prosthesis resulting in a delay and associated cost,
- sending said new prosthesis also resulting in a delay and associated cost,
- asking the client to come back, and
- working to seat the new prosthesis, which requires time and is therefore costly, not counting the time spent to exchange information and the negative impact on the reputation of the practitioner.
- It is imperative to ensure quality control upstream of the installation, from the time of manufacture, so that the practitioner is guaranteed to receive a prosthesis ready to be seated, in conformity with the parameters established during the shade selection.
- The first difficulty is precisely the shade selection. Shade selection entails recording a set of tooth features that aims to bring about in the most faithful way possible the appearance of the tooth. The tooth shade corresponds to the color of the tooth, that is to say, brightness, saturation, hue, but may also incorporate any parameter that has an effect on the appearance of the tooth such as its translucency or transparency, or even its surface condition.
- When manufacturing a dental prosthesis, the prosthesis must exactly match the colors of the neighboring teeth, or as close as possible, in order to go unnoticed in the patient's mouth.
- According to a known technique, the evaluation of the shade of a tooth can be done visually by a dentist. The dentist performs the shade selection for manufacturing the dental prosthesis by comparing the patient's tooth to teeth in a reference color chart. Once the shades are determined, they are communicated to a dental technician to enable him to choose the pulp mixtures to be used in the manufacture of the corresponding prosthesis. This measurement technique is unreliable. The evaluation of the shade of a tooth is subjective and can vary from one practitioner to another because of the perception of the eye mechanism. This measure is also influenced by environmental factors such as the lighting conditions.
- To overcome the practitioner's perception errors, a more objective evaluation of a tooth can be performed under a light beam using a spectrum analyzer. Such a device comprises a handle and a measuring head coming into contact with the tooth to be measured, the measuring head being connected to the emission-reception means by a fiber optic bundle. The handle comprises a light source such as light-emitting diodes (LEDs) and the measuring head comprises light sensors. However, this device can only make spot measurements on the tooth.
- According to another form of execution, it is also possible to use an imaging device for performing a mapping of the tooth. The captured image is then subjected to image processing such as automatic segmentation to determine a set of characteristics of the tooth. Such a shooting device comprises a measuring head and a handle. The head includes at least an image sensor, an optical system and an LED lighting system for illuminating the shooting area. Although it can perform a two-dimensional measurement, this device has a relatively bulky measuring head.
- Another drawback of these known devices is related to the fact that the measuring head remains stationary relative to the handle. Therefore, the use of these devices is limited to a front portion of the patient's dental arch.
- Also, even though the devices of the prior art may be used for implementing the method according to the invention, the device described below for implementing the method according to the present invention achieves a better result. This device aims to overcome the disadvantages of the prior art by providing a device with a very compact measuring head which allows performing a two-dimensional analysis while having access to all the teeth in the mouth. The method for manufacturing and controlling is consequently optimized.
- For this purpose, the tooth shade measuring device includes a housing, a handle and a measuring head, said measuring head comprising:
-
- a hollow body extending along a longitudinal axis, said hollow body comprising a proximal end, a distal end bent relative to the longitudinal axis, said distal end being provided with a removable tip intended to come into contact with the tooth surface to be analyzed;
- at least one light source and image acquiring means integral with the hollow body, said hollow body being adapted to transmit light from said light source from the proximal end to the distal end;
and said device comprising an orientation assembly for mounting the proximal end of the hollow body in the housing so that the measuring head occupies different angular positions relative to the housing.
- According to one embodiment of the device, the orientation assembly comprises at least a first half-shell suitable to be assembled to a second half-shell to form a hollow shell defining a cavity configured to receive said proximal end, said cavity having on its inner surface a radially projecting surface intended to cooperate with a plurality of slots having a complementary shape formed on the outer surface of the proximal end to ensure the different angular positions of the measuring head relative to the housing.
- Advantageously, the orientation assembly comprises a locking means for locking the measuring head in a defined angular position relative to the housing.
- It is therefore understandable that the shade selection, when focusing on the patient's tooth and limiting the interactions of adjacent teeth, overcomes the impact of the whole environment of the tooth concerned.
- Thus, as the shade selection is well focused thanks to the device, and as this shade selection overcomes the environment, the parameters measured and transmitted to the dental technician and/or the laboratory will be subsequently perfectly matched and allow adequate control since the prosthesis, while in its place of manufacture, is precisely not in its environment.
- Other features and advantages of the method according to the present invention will appear from the following description of particular embodiments, given as nonlimiting examples, as well as from the description of the device used, this with reference to the accompanying drawings, in which:
-
FIG. 1 is a schematic perspective view of a shade selecting device according to an embodiment; -
FIG. 2 is an exploded perspective view of the measuring head of the device ofFIG. 1 ; -
FIG. 3 is a bottom view in section of the housing of the device ofFIG. 1 ; -
FIG. 4A is a perspective view of the optical waveguide of the measuring head; and -
FIG. 4B is a perspective view of the optical waveguide provided with an overmolding; -
FIG. 5A illustrates a perspective view of the bent distal end of the hollow body, the tip of the distal end being provided with image acquisition means, -
FIG. 5B illustrates a perspective view of the tip of the measuring head; -
FIG. 5C illustrates a perspective view of the tip attached to the extremity of the bent distal end of the hollow body; -
FIG. 6 is a view of the measuring head ofFIG. 2 in an assembled configuration; -
FIG. 7 is a sectional view of the proximal end of the measuring head held between two half-shells of the orientation assembly of the device, -
FIG. 8 shows a block diagram of the method for manufacturing and controlling of the present invention, in the simple case of a practitioner and a dental technician, and -
FIG. 9 shows a block diagram of the method for manufacturing and controlling of the present invention, in the case of a practitioner, a dental technician and a delocalized laboratory. -
FIG. 1 shows in 1 a measuring device for acquiring a color image of a tooth or the spectral data of a tooth. These measures allow achieving a complete and precise mapping of the variations in the different characteristics of the tooth. In particular, this mapping allows determining the tooth shade for the realization of a dental prosthesis according to the method of the present invention. - The device comprises a
gripping handle 10 topped by ahousing 11, one end of thehousing 11 being provided with a measuringhead 20 for acquiring spectral data or images. - According to one embodiment, the
housing 11 has a substantially parallelepipedic shape with anupper face 14 comprising adisplay 15 which is used to indicate in real time the data relating to the analyzed tooth generated by the measuringhead 20. - These data can then be transmitted to the computer means of the user by Wi-Fi connection or through a USB connection to be processed by a calculation software for processing the images. In this case, the data is transmitted to a computer station accessible by the practitioner who performed said measure in order to integrate these data in the client's record.
- According to a particularly advantageous embodiment, the calculation unit is integrated directly into the
housing 11 that allows displaying the color map of the analyzed tooth. In this case, the processed data are stored directly on the computer station of the practitioner. - Computer station means, in the remainder of this description, either a networked workstation or an isolated computer connected to the Internet cloud so as to allow a controlled and secure access to said data by authorized third parties.
- According to one embodiment, the device comprises a base 17 for placing the unit on a flat surface. The base 17 also includes a wired USB-
type connection 13 for data transfer. Furthermore, thehandle 10 comprises a housing for receiving a battery. This battery can be recharged when the device is placed on its base, via a USB connection or via a charger connected to the mains. - The
gripping handle 10 further comprises an activation button 12 of the measuring head. - According to an embodiment illustrated in
FIGS. 1 to 4 , the measuringhead 20 comprises ahollow body 40 oriented along alongitudinal axis 46. This hollow body comprises aproximal end 48 mounted to thehousing 11 and a bentdistal end 49 provided with aremovable tip 26 designed to come into contact with the tooth surface to be analyzed. Thehollow body 40 also includes apassage 29 which extends from theproximal end 48 to thedistal end 49. The extremity 48B of theproximal end 48 and theextremity 49B of thedistal end 49 are open. - The measuring
head 20 includes at least onelight source 21 and image acquisition means, integral to thehollow body 40. - According to a preferred embodiment of the device, said at least one light source is fixed to the extremity 48B of the
proximal end 48 of thebody 40 and the image acquisition means is fixed to theextremity 49B of thedistal end 49 of thebody 40. The latter allows transmitting the illumination light from thelight source 21 from theproximal end 48 of the body to thedistal end 49 of the body to illuminate the tooth surface to be analyzed. The device further comprises acable 28 for transmitting data extending into thepassage 29 of the body from theproximal end 48 of the body to thedistal end 49 for transmitting at least one image from the distal end up to the proximal end. This cable connects in particular the acquisition means to a data processing unit. - According to one embodiment, the
hollow body 40 consists of anoptical waveguide 41 for guiding the illumination light emitted from the light source to a tooth surface, surrounded by anovermolding 42. - According to an important feature, the device includes an
orientation assembly 50 for associating theproximal end 48 of thehollow body 40 to thehousing 11 so that the measuringhead 20 occupies different angular positions relative to the housing. This specific arrangement enables imparting to the device an additional degree of freedom to facilitate access to the teeth of the two dental arches. In addition, being able to guide the measuring head without changing the position and orientation of thehandle 10 relative to the tooth surface to be analyzed enhances the usability of the device for the user. - The axis XX′ of the
distal end 49 of thehollow body 40 is preferably bent at an inclination angle α relative to thelongitudinal axis 46 carried by thebody 40 to facilitate access of the measuring head to the teeth located in the rear part of the two dental arches. This angle is between 10 and 60°. It is preferably equal to 45°. - Cooperation between the bent
distal end 49 of thehollow body 40 and the various angular positions allows positioning thetip 26 so that the longitudinal axis XX′ of thetip 26 is always perpendicular to the tooth surface to be analyzed. - The
orientation assembly 50 comprises a first half-shell 51 and a second half-shell 52, the two half-shells being assembled to form a hollow shell defining acavity 53 around thelongitudinal axis 46. The two half-shells proximal end 48 of thehollow body 40 is received in thecavity 53. One of the two half-shells 52 comprises aradially projecting surface 56 designed to cooperate with a plurality of slots having a complementary shape, formed on an outer surface of theproximal end 48 of thehollow body 40 to ensure the different angular positions of the measuringhead 20 relative to thehousing 11. - As illustrated in
FIG. 7 , theproximal end 48, which has a substantially circular cross-section, is housed in thecavity 53 formed by the two half-shells proximal end 48 has on its outer surface a series of seven slots numbered 57.1 through 57.7. The slots 57.1 to 57.7 are distributed so as to position the measuring head in various angular positions between 0 and 270°. The slots are distributed in such a way that the angular increment between two positions is equal to 45°. InFIG. 7 , the measuringhead 20 is oriented in an angular position in which the projectingsurface 56 is received in the slot 57.1, corresponding for example to a reference angular position equal to 0°. The measuringhead 20 is then oriented relative to this reference angular position. - The radially projecting surface, designed to cooperate with one of the
slots 57, is formed by aball screw 55 received in aslot 54 arranged in the wall of one of the half-shells 52 of the orientation assembly. The ball screw 55 comprises at one end facing the interior of thecavity 53, a ball which forms the projectingsurface 56 having a shape complementary to that of the slots. - To place the measuring
head 20 in a defined angular position, the optical waveguide is made to rotate in order to place the ball in one of the slots. - Advantageously, the
ball screw 55 is also a locking means for locking the measuring head in the selected angular position. - In one advantageous embodiment, the
proximal end 48 of the body is provided with an abutment which limits the orientation of the measuring head only between 0°, corresponding to the position illustrated inFIG. 7 , and 270°. This abutment helps prevent the measuring head from performing complete revolutions, thereby preventing thedata transmission cable 28 from twisting. - In one particularly advantageous embodiment illustrated in
FIGS. 4A and 4B , the hollowlongitudinal body 40 is composed of anoptical waveguide 41 and anovermolding 42 surrounding theoptical waveguide 41. Consequently, theoptical waveguide 41 and theovermolding 42 include a distal end corresponding to thedistal end 49 of thehollow body 40, and a proximal end corresponding to theproximal end 48 of thehollow body 40. - The
optical waveguide 41 allows guiding the light from thelight source 21 from theproximal end 48 to thedistal end 49 to illuminate a tooth surface to be analyzed. In parallel, thepassage 29, which extends from theproximal end 48 to thedistal end 49 of the hollow body, allows the passage of acable 28 for transmission of data taken by the acquisition means to a data processing unit. - The
overmolding 42 includes a set of units distributed along its outer surface and configured to allow, on the one hand, fixing thetip 26 on theextremity 49B of thedistal end 49 of theovermolding 42, and, on the other hand, mounting theproximal end 48 in thehousing 11 by means of theorientation assembly 50. - The units form, at a distal end of
overmolding 42, aclipping unit 43. Thetip 26 comprises acomplementary clipping unit 26A. The twounits movable tip 26 of the optical waveguide. Theremovable tip 26, which can be sterilized and has a time-restricted use, can thus be very easily manually mounted or removed on/from thebody 40. - Advantageously, the units form a first thickened portion forming a first
annular shoulder 44 and a second thickenedportion 45 forming a secondannular shoulder 45. The first thickenedportion 44 forms an abutment against which anend 14 of thehousing 11 comes to rest. The second thickenedportion 45 forms an axial positioning abutment for thebody 40 when theproximal end 48 is mounted in thecavity 53 formed by the two half-shells - Advantageously, the units also form a plurality of slots 57.1-57.7 formed on the outer surface of the
overmolding 42, at theproximal end 48 of theovermolding 42. These slots are designed to cooperate with the radially projecting surface on the inner surface of thecavity 53 to ensure different angular positions of the measuringhead 20 relative to thehousing 11. - Thus, when the measuring head is mounted in the
housing 11, as illustrated inFIG. 3 , one end of thehousing 14 bears against theannular shoulder 44 of theovermolding 42. In addition, theproximal end 48 is held in position in thecavity 53 formed by the two half-shells which are fixed in a slot of thehousing 11. - Preferably, the optical waveguide and the
overmolding 42 are made of a lower refractive material than the material of the optical waveguide so as not to degrade the guiding conditions of the light. As an example, the optical waveguide is made of polymethylmethacrylate (PMMA) and the overmolding is made of polytetrafuoroethylene (PTFE). - Preferably, the
optical waveguide 41 and theovermolding 42 are isolated from the outside by a metal coating to ensure proper guiding of the illumination light and the insulation of the outer light guide. - The faces of the guide can be machined to generate units designed to optimize the illumination at the output of the guide.
- In known manner, the image acquisition means comprises a
sensor 24 and anoptical system 22. - The
sensor 24 is, for example, a sensor provided with a pixel array so as to provide a signal for rendering an image of the tooth or a portion of the tooth. The sensor is preferably a field effect sensor. The sensor is connected to a data processing unit. - The
illumination source 21 is fixed on a mountingbracket 27. The mountingbracket 27 is adapted to be positioned on a mountingsurface 47 formed on the extremity 48B of theproximal end 48 of theovermolding 42. - Preferably, the
bracket 27 also comprises a data processing unit and a control board of the light source. This board can also be offset on another electronic board associated with the display electronics. - Preferably, the illumination source comprises at least one white light-emitting diode and LED light-emitting diodes, whose wavelengths range between 448 and 630 nm, attached to the mounting
bracket 27. - According to an advantageous embodiment of the invention, the LEDs, the control board and the optical system are integral with the
overmolding 42. Thanks to this specific configuration, the sensor always sees the same distribution for a given LED. Thus, whatever the orientation of the body or of theoptical waveguide 41, the illuminating beam on the tooth surface to be analyzed is always the same. - The use of an optical waveguide for conveying the light of the LEDS to a surface to be analyzed allows deporting the illumination sources while providing the most homogeneous possible illumination on the surface to be analyzed and this, regardless of the LED used and the orientation of the measuring head relative to the housing.
- The
optical system 22 includes alens 25 andpolarizing filters 23. - Mounting is achieved by setting the
sensor 24 on a support piece 24.1 that receives an immobilizinglock 30. Thelens 25 is screwed to the support piece 24.1 by a very fine thread to adjust the focal distance very accurately. - The support piece 24.1 with its sensor and bearing the
lens 25 is introduced into theoptical waveguide 29 and secured by any means, particularly by bonding. - According to an advantageous embodiment illustrated in
FIG. 5 , theoptical system 22 includespolarizing filters 23 positioned near thedistal end 26A of thetip 26. These filters allow eliminating the light reflected by the surface to be analyzed. - According to one embodiment of the device, a first glass slide and a second glass slide maintain sandwiched a first
polarizing filter 23 for the emitting part and asecond filter 23 for the receiving part. The two slides and the two rectilinear polarizing filters, arranged so that their polarization axes are orthogonal, form adisk 23 having a diameter of 16 mm. - According to one embodiment, this
disk 23 is attached by bonding to a glass slide which is clipped onto the end of the guide, or alternatively, thedisk 23 is glued directly to theextremity 49B of thedistal end 49 of theovermolding 42, as shown inFIG. 5A . -
FIG. 5B shows in more detail thetip 26 that has a substantially tubular shape. This tip is made of a material having an opaque color. This tip is configured to be fixed on theextremity 49B of thedistal end 49 of theovermolding 42. Thetip 26 comprises adistal end 26A intended to come in contact with the tooth and aproximal end 26B positioned near the image acquisition means. Advantageously, thedistal end 26A is separated from theproximal end 26B by a predetermined distance corresponding to a working distance to acquire an image. According to another advantage, the use of this tip allows eliminating stray light in the vicinity of the analyzed tooth. In addition, the tip allows precise positioning of the measuring head. - The
proximal end 26B of thetip 26 comprises on its inner surface a clipping unit 26C that cooperates with aclipping unit 43 formed at thedistal end 49 of theovermolding 42 for securing the tip on the body. The tip, which is for single use, can be manually mounted or removed very simply on/from the hollow body. - Preferably, the tip is in the form of a disposable cap having a tubular shape which extends the bent
distal end 49 of the overmolding. As such, the tip has an angle of inclination α relative to thelongitudinal axis 46 of thebody 40 when attached to the latter. (SeeFIG. 6 .) - According to another important feature, this tip includes a chromatic reference surface which allows the measuring device to perform an automatic self-calibration.
- The practitioner can therefore hold the device that has just been described and receive data on the tooth before proceeding with its sizing and/or caring and/or preparing.
- Processing the measured data allows determining the color of the tooth by areas, for example three areas. The self-calibration provides a comparison from a same reference, regardless of the device being used. The dental technician knows then which are the areas and which color to attribute to each of said areas so as not to have a uniform prosthesis whose aesthetic appearance would be unacceptable.
- In addition, the practitioner can also take a complementary photo to scan the environment of the tooth or teeth affected by the seating of a prosthesis. To this end, an application can be developed in conjunction with the data and customer information processing software to introduce these complementary photos. Advantageously, the integration of photos into a file and their addition to the transmitted data will be automatically executed so that the practitioner does not have to worry about it, the practitioner needing only to open the patient's record.
- It is indeed important to provide the dental technician, in addition to shade, brightness and translucency, parameters such as a color photo of the tooth whenever possible, photos of context i.e. a photo of the face, of the smile and photos with spacers more or less close to the reference tooth, or even the type of the stump and color of the stump used.
- The method of the invention consists, as shown schematically in the block diagram of
FIG. 8 , in following the sequence of the following steps: -
- a) selecting the shade of the client's tooth to be replaced or restored by the practitioner using a color imaging device belonging to the practitioner, called DPraticien with local storage of such data,
- b) transmitting these data to a computer station in the practitioner's office which is equipped with software for the visualization of the measurement data and possibly with software for the entry of the client's contact information and specific data, both software programs being advantageously combined,
- c) transmitting these data to the computer station of a given dental technician,
- d) manufacturing the prosthesis according to the data received from the practitioner,
- e) controlling the data of the prosthesis manufactured by the dental technician using a shade selecting device identical to that belonging to said dental technician, called DProthésiste, calibrated in the same way as the DPraticien device of the practitioner,
- f) sending of the compliant prosthesis by the dental technician to the practitioner.
- The method includes an additional step of transmitting, from the dental technician to the practitioner this time, the data of the manufactured prosthesis, as measured with said DProthésiste, prior to sending said prosthesis, its shipment occurring only if the practitioner gives his confirmation. The method becomes:
-
- a) selecting the shade of the client's tooth to be replaced or restored by the practitioner using the DPraticien,
- b) transmitting these data to the practitioner's computer station,
- c) transmitting these data from the practitioner's computer station to the computer station of the dental technician,
- d) manufacturing the prosthesis according to the data received from the practitioner,
- e) controlling the data of the prosthesis manufactured using the DProthésiste,
- f) transmitting the data of the manufactured prosthesis to the practitioner for his approval, and
- g) sending of the compliant prosthesis by the dental technician to the practitioner after said practitioner's approval.
- The invention also allows the practitioner to send amendments before giving his approval for the shipment of the prosthesis, see
FIG. 9 . In this case, the block diagram becomes the following: -
- a) selecting the shade of the client's tooth to be replaced or restored by the practitioner using the DPraticien,
- b) transmitting these data to the practitioner's computer station,
- c) transmitting these data from the practitioner's computer station to the computer station of the dental technician,
- d) manufacturing the prosthesis according to the data received from the practitioner,
- e) controlling the data of the prosthesis manufactured using the DProthésiste,
- f) transmitting the data of the manufactured prosthesis to the practitioner for his approval,
- g) transmitting data changes by the practitioner,
- h) changes made to the prosthesis by the dental technician according to these data changes,
- i) controlling the data of the prosthesis manufactured using the DProthésiste,
- j) transmitting data of the modified prosthesis by the dental technician to the practitioner for approval by the practitioner, and
- k) sending of the compliant prosthesis by the dental technician to the practitioner after said practitioner's approval.
- The device for selecting the shade of the tooth for all the steps of the method, both the DPraticien and the DProthésiste, is advantageously the device which was described above in the present invention and which comprises a swivel head, which allows selecting a much more precise shade by orienting the head of said device on said tooth followed by a measurement of said tooth parameters.
- The method also provides that, notwithstanding the quality of the exchanges of the data obtained, the practitioner make corrections, which may be related to his expertise, to the manufactured prosthesis whose data have been transmitted. Therefore, the dental technician can make changes before submitting new data on the modified prosthesis and sending the finalized prosthesis after confirmation of compliance by the practitioner.
- The method of the invention allows solving the problem raised, namely the quality control of the prosthesis by the dental technician before he sends it to the practitioner, based on measured parameters identical to the parameters measured by the practitioner.
- In all cases, once the prosthesis is seated, the practitioner returns to the management software to perform the seating and compliance control, the dental technician being informed of this seating.
- The practitioner can also add comments, if necessary, to ensure accurate feedback to the dental technician concerned, or make a comment on a dedicated community forum.
- It is also possible to use the cloud technology for the transfer of data that represent bulky files, which is simply a virtual server. This type of virtual communication and servers or IT are perfectly included in the method according to the invention.
- The method also allows completing the data on the tooth or teeth involved at any time with data from the peripheral dental context of the tooth or teeth concerned. Such contextual data can be digital photos as described above, data on the material to be used or even the trademark of the ceramic powder, etc.
Claims (20)
1. A method for manufacturing and controlling the conformity of a dental prosthesis from parameters obtained intra-orally with a shade selecting device characterized in that it comprises the following steps:
a) selecting the shade of the client tooth to be replaced or restored by the practitioner using the shade selecting device belonging to the practitioner, called DPraticien, with local storage of such data,
b) transmitting these data to a computer station of the practitioner which is equipped with software for the visualization of the measurement data and possibly with software for the entry of the client's contact information and specific data, both software programs being advantageously combined,
c) transmitting these data to the computer station of the dental technician,
d) manufacturing the prosthesis according to the data received from the practitioner,
e) controlling the data of the prosthesis manufactured by the dental technician using a shade selecting device identical to that belonging to said dental technician, called DProthésiste, calibrated in the same way as the DPraticien device of the practitioner,
f) sending of the compliant prosthesis by the dental technician to the practitioner.
2. The method for manufacturing and controlling the conformity of a dental prosthesis according to claim 1 , characterized in that it comprises the following steps:
a) selecting the shade of the client's tooth to be replaced or restored by the practitioner using the DPraticien,
b) transmitting these data to the practitioner's computer station,
c) transmitting these data from the practitioner's computer station to the computer station of the dental technician,
d) manufacturing the prosthesis according to the data received from the practitioner,
e) controlling the data of the prosthesis manufactured using the DProthésiste,
f) transmitting the data of the manufactured prosthesis to the practitioner for his approval, and
g) sending of the compliant prosthesis by the dental technician to the practitioner after said practitioner's approval.
3. The method for manufacturing and controlling the conformity of a dental prosthesis according to claim 2 , characterized in that it comprises the following steps:
a) selecting the shade of the client's tooth to be replaced or restored by the practitioner using the DPraticien,
b) transmitting these data to the practitioner's computer station,
c) transmitting these data from the practitioner's computer station to the computer station of the dental technician,
d) manufacturing the prosthesis according to the data received from the practitioner,
e) controlling the data of the prosthesis manufactured using the DProthésiste,
f) transmitting the data of the manufactured prosthesis to the practitioner for his approval,
g) transmitting data changes by the practitioner,
h) changes made to the prosthesis by the dental technician according to these data changes,
i) controlling the data of the prosthesis manufactured using the DProthésiste,
j) transmitting data of the modified prosthesis by the dental technician to the practitioner for approval by the practitioner, and
k) sending of the compliant prosthesis by the dental technician to the practitioner after said practitioner's approval.
4. The method for manufacturing and controlling the conformity of a dental prosthesis according to claim 1 , characterized in that the DProthésiste and DPraticien devices for selecting the shade and for controlling said shade comprises a housing, a handle and a measuring head provided with a tip intended to come into contact with the tooth surface to be analyzed, at least one light source and image acquiring means, as well as an orientation assembly allowing the measuring head to occupy different angular positions relative to the housing.
5. The method for manufacturing and controlling the conformity of a dental prosthesis according to claim 1 , characterized in that the transmitted data includes contextual data including: a photo of the face and/or smile and photos with spacers more or less close to the reference tooth or also the type of stump and/or the color of the stump used.
6. A device for tooth shade measurement comprising a housing, a handle and a measuring head, characterized in that said measuring head comprises:
a hollow body extending along a longitudinal axis, said hollow body comprising a proximal end, a bent distal end relative to the longitudinal axis, said distal end being provided with a removable tip designed to come into contact with a tooth surface to be analyzed;
at least one light source and image acquisition means, integral with the hollow body, said hollow body being adapted to transmit the light from said light source from the proximal end up to the distal end;
and in that said device comprises an orientation assembly for mounting the proximal end of the hollow body in the housing so that the measuring head occupies different angular positions relative to the housing.
7. The device according to claim 6 , characterized in that the orientation assembly comprises at least a first half-shell adapted to be joined to a second half-shell to form a hollow shell defining a cavity configured to receive said proximal end, said cavity having on its inner surface a radially projecting surface intended to cooperate with a plurality of slots having a complementary shape, formed on the outer surface of the proximal end to ensure the different angular positions of the measuring head relative to the housing.
8. The device according to claim 6 , characterized in that the orientation assembly comprises a locking means for locking the measuring head in a defined angular position relative to the housing.
9. The device according to claim 6 , characterized in that said hollow body is composed of an optical waveguide surrounded by an overmolding comprising a set of fastening units.
10. The device according to claim 9 , characterized in that said set of units comprises a clipping unit formed on the extremity of the distal end of the hollow body to fasten the tip.
11. The device according to claim 9 , characterized in that said set of units comprises an annular shoulder forming an axial abutment for the hollow body when the proximal end is mounted in said orientation assembly.
12. The device according to claim 6 , characterized in that said at least one light source is fastened to the extremity of the proximal end of the hollow body and said image acquisition means is fastened to the extremity of the distal end of the hollow body.
13. The device according to claim 12 , characterized in that it comprises a cable extending into the hollow body substantially from the proximal end to the distal end for transmitting an image from the distal end to the proximal end.
14. The device according to claim 6 , characterized in that said image acquisition means comprises a sensor and an optical system.
15. The device according to claim 6 , characterized in that said at least one light source comprises at least one white light-emitting diode (LED) and light-emitting diodes (LEDs) whose wavelengths range between 448 and 630 nm, said LEDs being fastened on a support.
16. The device according to claim 15 , characterized in that said support comprises a data processing unit and an LED control board.
17. The device according to claim 6 , characterized in that the optical system comprises a lens and at least one polarizing filter.
18. The device according to claim 6 , characterized in that the tip comprises a distal end intended to come into contact with the tooth surface to be analyzed and a proximal end, said proximal end being separated from said distal end by a predetermined distance corresponding to a working distance to acquire an image.
19. The device according to claim 6 , characterized in that the tip includes a chromatic reference surface.
20. The device according to claim 6 , characterized in that it comprises a base to put the device on a flat surface, the base comprising a housing adapted to receive at least one battery.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/854,077 US10792134B2 (en) | 2015-06-30 | 2017-12-26 | Method and device for manufacturing and controlling the conformity of a dental prosthesis from parameters obtained with a shade selecting device |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1556141A FR3038220B1 (en) | 2015-06-30 | 2015-06-30 | METHOD FOR PERFORMING AND MONITORING THE CONFORMITY OF A DENTAL PROSTHESIS FROM PARAMETERS OBTAINED WITH A HAND DRAWING DEVICE |
FR1556140A FR3038221A1 (en) | 2015-06-30 | 2015-06-30 | APPARATUS FOR MEASURING DENTAL TINT |
FR1556141 | 2015-06-30 | ||
FR1556140 | 2015-06-30 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/854,077 Division US10792134B2 (en) | 2015-06-30 | 2017-12-26 | Method and device for manufacturing and controlling the conformity of a dental prosthesis from parameters obtained with a shade selecting device |
Publications (1)
Publication Number | Publication Date |
---|---|
US20170000591A1 true US20170000591A1 (en) | 2017-01-05 |
Family
ID=57683110
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/837,449 Abandoned US20170000591A1 (en) | 2015-06-30 | 2015-08-27 | Method And Device For Manufacturing And Controlling The Conformity Of A Dental Prosthesis From Parameters Obtained With A Shade Selecting Device |
US15/854,077 Active US10792134B2 (en) | 2015-06-30 | 2017-12-26 | Method and device for manufacturing and controlling the conformity of a dental prosthesis from parameters obtained with a shade selecting device |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/854,077 Active US10792134B2 (en) | 2015-06-30 | 2017-12-26 | Method and device for manufacturing and controlling the conformity of a dental prosthesis from parameters obtained with a shade selecting device |
Country Status (1)
Country | Link |
---|---|
US (2) | US20170000591A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3456289A1 (en) * | 2017-07-28 | 2019-03-20 | Colgate-Palmolive Company | System and method for measuring color or shade of an object |
EP3650821A1 (en) * | 2018-11-08 | 2020-05-13 | Sirona Dental Systems GmbH | System and method for determining the color of teeth and attachment for use in the system |
US11120179B2 (en) * | 2018-03-22 | 2021-09-14 | James R. Glidewell Dental Ceramics, Inc. | System and method for performing quality control |
US11210788B2 (en) * | 2018-03-22 | 2021-12-28 | James R. Glidewell Dental Ceramics, Inc. | System and method for performing quality control |
US11334977B2 (en) * | 2018-03-22 | 2022-05-17 | James R. Glidewell Dental Ceramics, Inc. | System and method for performing quality control of manufactured models |
Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1384513A (en) * | 1920-06-08 | 1921-07-12 | Cheney Brothers | Apparatus for comparing, matching, and measuring shades and colors |
US1548238A (en) * | 1922-03-07 | 1925-08-04 | Walter A Adams | Support for electric lamps |
US2542038A (en) * | 1946-03-04 | 1951-02-20 | Howard B Lewis | Air hammer |
US4564354A (en) * | 1982-09-21 | 1986-01-14 | Dentalwerk Buroos Gesellschaft m.b.H. | Angle piece for dental purposes |
US6157454A (en) * | 1998-09-02 | 2000-12-05 | Colorimeter, Llc | Miniature colorimeter |
US20020012895A1 (en) * | 1995-06-26 | 2002-01-31 | Shade Analyzing Technologies, Inc. | Tooth shade analyzer system and methods |
US20020171824A1 (en) * | 2001-05-16 | 2002-11-21 | Overbeck James L. | Glare-directed imaging |
US20030156283A1 (en) * | 2002-02-21 | 2003-08-21 | Lj Laboratories, L.L.C. | Miniaturized system and method for measuring optical characteristics |
US20030207228A1 (en) * | 1998-11-03 | 2003-11-06 | Shade Analyzing Technologies, Inc. | Interactive dental restorative network |
US6750971B2 (en) * | 1999-12-08 | 2004-06-15 | X-Rite, Incorporated | Optical measurement device and related process |
US6870616B2 (en) * | 1998-06-30 | 2005-03-22 | Jjl Technologies Llc | Spectrometer apparatus for determining an optical characteristic of an object or material having one or more sensors for determining a physical position or non-color property |
US20060139644A1 (en) * | 2004-12-23 | 2006-06-29 | Kahn David A | Colorimetric device and colour determination process |
US20080063998A1 (en) * | 2006-09-12 | 2008-03-13 | Rongguang Liang | Apparatus for caries detection |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5880826A (en) | 1997-07-01 | 1999-03-09 | L J Laboratories, L.L.C. | Apparatus and method for measuring optical characteristics of teeth |
US6038024A (en) * | 1998-01-09 | 2000-03-14 | Mht Optic Research | Method and an apparatus for determining the color stimulus specification of an object |
US6331113B1 (en) * | 1999-01-21 | 2001-12-18 | Dentech, L.L.C. | Automated tooth shade analysis and matching system |
US6190170B1 (en) * | 1998-05-05 | 2001-02-20 | Dentech, Llc | Automated tooth shade analysis and matching system |
US6249348B1 (en) | 1998-11-23 | 2001-06-19 | Lj Laboratories, L.L.C. | Integrated spectrometer assembly and methods |
US6328567B1 (en) * | 1999-01-21 | 2001-12-11 | Dentech, Llc | Method, apparatus and system for automated tooth shade analysis and matching |
US7234937B2 (en) * | 1999-11-30 | 2007-06-26 | Orametrix, Inc. | Unified workstation for virtual craniofacial diagnosis, treatment planning and therapeutics |
US6540513B2 (en) * | 2000-07-11 | 2003-04-01 | Mht Optic Research Ag | Apparatus for simulating the ambient color and translucence conditions in the oral cavity of a patient |
US20020021439A1 (en) * | 2000-08-07 | 2002-02-21 | Derek Priestley | Colour matching system |
US9421074B2 (en) * | 2001-04-13 | 2016-08-23 | Orametrix, Inc. | Unified three dimensional virtual craniofacial and dentition model and uses thereof |
US7064830B2 (en) * | 2003-06-12 | 2006-06-20 | Eastman Kodak Company | Dental color imaging system |
US7213995B2 (en) | 2003-12-15 | 2007-05-08 | Michael Bravo-Loubriel | Toothbrush for prevention treatment of tooth sensitivity and method therefor |
US20070212667A1 (en) | 2006-03-13 | 2007-09-13 | Jung Wayne D | Systems and methods for preparing dental restorations |
WO2008036644A1 (en) | 2006-09-21 | 2008-03-27 | X-Rite, Inc. | Color measurement instrument |
US20090133260A1 (en) * | 2007-11-26 | 2009-05-28 | Ios Technologies, Inc | 3D dental shade matching and apparatus |
JP2009160086A (en) * | 2007-12-28 | 2009-07-23 | Olympus Corp | Dental color measurement tool, dental color measurement tool system, and dental color measurement system |
US8160899B2 (en) * | 2008-01-31 | 2012-04-17 | Paul Rhodes | Knowledge based electronic clinical record for dentistry |
WO2010008435A1 (en) * | 2008-06-02 | 2010-01-21 | Dentsply International Inc. | Methods for designing a customized dental prosthesis using digital images of a patient |
US20110171604A1 (en) * | 2010-01-11 | 2011-07-14 | Duane Milford Durbin | Method for manufacturing and supply of dental prosthesis |
US8571281B2 (en) * | 2010-07-13 | 2013-10-29 | Carestream Health, Inc. | Dental shade mapping |
US20130096457A1 (en) | 2011-10-18 | 2013-04-18 | Qscope, LLC | Oral scope system with image sensor and method for visual examination of oral cavity and upper airway |
US20140095200A1 (en) * | 2012-10-01 | 2014-04-03 | Ellen M. Bostock | Rapid identification of dental prostheses |
US10299891B2 (en) * | 2016-03-16 | 2019-05-28 | Easyrx, Llc. | System and method for ordering and manufacturing customized orthodontic appliances and product |
-
2015
- 2015-08-27 US US14/837,449 patent/US20170000591A1/en not_active Abandoned
-
2017
- 2017-12-26 US US15/854,077 patent/US10792134B2/en active Active
Patent Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1384513A (en) * | 1920-06-08 | 1921-07-12 | Cheney Brothers | Apparatus for comparing, matching, and measuring shades and colors |
US1548238A (en) * | 1922-03-07 | 1925-08-04 | Walter A Adams | Support for electric lamps |
US2542038A (en) * | 1946-03-04 | 1951-02-20 | Howard B Lewis | Air hammer |
US4564354A (en) * | 1982-09-21 | 1986-01-14 | Dentalwerk Buroos Gesellschaft m.b.H. | Angle piece for dental purposes |
US20020012895A1 (en) * | 1995-06-26 | 2002-01-31 | Shade Analyzing Technologies, Inc. | Tooth shade analyzer system and methods |
US6870616B2 (en) * | 1998-06-30 | 2005-03-22 | Jjl Technologies Llc | Spectrometer apparatus for determining an optical characteristic of an object or material having one or more sensors for determining a physical position or non-color property |
US6157454A (en) * | 1998-09-02 | 2000-12-05 | Colorimeter, Llc | Miniature colorimeter |
US20030207228A1 (en) * | 1998-11-03 | 2003-11-06 | Shade Analyzing Technologies, Inc. | Interactive dental restorative network |
US6750971B2 (en) * | 1999-12-08 | 2004-06-15 | X-Rite, Incorporated | Optical measurement device and related process |
US20020171824A1 (en) * | 2001-05-16 | 2002-11-21 | Overbeck James L. | Glare-directed imaging |
US20030156283A1 (en) * | 2002-02-21 | 2003-08-21 | Lj Laboratories, L.L.C. | Miniaturized system and method for measuring optical characteristics |
US20060139644A1 (en) * | 2004-12-23 | 2006-06-29 | Kahn David A | Colorimetric device and colour determination process |
US20080063998A1 (en) * | 2006-09-12 | 2008-03-13 | Rongguang Liang | Apparatus for caries detection |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3456289A1 (en) * | 2017-07-28 | 2019-03-20 | Colgate-Palmolive Company | System and method for measuring color or shade of an object |
US10568545B2 (en) | 2017-07-28 | 2020-02-25 | Colgate-Palmolive Company | System and method for measuring color or shade of an object |
US11120179B2 (en) * | 2018-03-22 | 2021-09-14 | James R. Glidewell Dental Ceramics, Inc. | System and method for performing quality control |
US11210788B2 (en) * | 2018-03-22 | 2021-12-28 | James R. Glidewell Dental Ceramics, Inc. | System and method for performing quality control |
US20220108453A1 (en) * | 2018-03-22 | 2022-04-07 | James R. Glidewell Dental Ceramics, Inc. | System and method for performing quality control |
US11334977B2 (en) * | 2018-03-22 | 2022-05-17 | James R. Glidewell Dental Ceramics, Inc. | System and method for performing quality control of manufactured models |
US20220277436A1 (en) * | 2018-03-22 | 2022-09-01 | James R. Glidewell Dental Ceramics, Inc. | System and Method for Performing Quality Control of Manufactured Models |
US11915403B2 (en) * | 2018-03-22 | 2024-02-27 | James R. Glidewell Dental Ceramics, Inc. | System and method for performing quality control of manufactured models |
EP3650821A1 (en) * | 2018-11-08 | 2020-05-13 | Sirona Dental Systems GmbH | System and method for determining the color of teeth and attachment for use in the system |
WO2020094841A1 (en) * | 2018-11-08 | 2020-05-14 | Sirona Dental Systems Gmbh | System and method for determining the color of teeth and attachment for use in the system |
CN113039416A (en) * | 2018-11-08 | 2021-06-25 | 希罗纳牙科系统有限公司 | System and method for determining tooth color and accessory for use in the system |
Also Published As
Publication number | Publication date |
---|---|
US20180161132A1 (en) | 2018-06-14 |
US10792134B2 (en) | 2020-10-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10792134B2 (en) | Method and device for manufacturing and controlling the conformity of a dental prosthesis from parameters obtained with a shade selecting device | |
JP4808636B2 (en) | Apparatus and method for measuring dental shade | |
US6750971B2 (en) | Optical measurement device and related process | |
JP4527166B2 (en) | Interactive dental treatment network | |
Khurana et al. | A clinical evaluation of the individual repeatability of three commercially available colour measuring devices | |
US7522322B2 (en) | Apparatus for dental shade measurement | |
WO2011118839A1 (en) | System for measuring and processing dental replacement | |
US20090133260A1 (en) | 3D dental shade matching and apparatus | |
JP2010502300A (en) | Interactive dental restoration network | |
Ebeid et al. | Accuracy and repeatability of different intraoral scanners on shade determination | |
US20210389182A1 (en) | System and method for determining the color of teeth and attachment for use in the system | |
JP2018149187A (en) | Dental measurement device, tip of dental measurement device, and dental measurement system | |
EP1477107B1 (en) | Optical measurement device and related process | |
US20210045851A1 (en) | Electronic impression tray for obtaining dental information | |
EP3111883B1 (en) | Method for manufacturing and testing the conformity of a dental prosthesis using parameters obtained via a colour capturing device | |
Philippi et al. | Clinical tooth Color Matching: in vivo comparisons of Digital Photocolorimetric and Spectrophotometric analyses | |
WO2017001779A2 (en) | Tooth shade measurement device | |
FR2894666A1 (en) | SYSTEM FOR OPTICALLY MEASURING THE COLORIMETRY OF AN OBJECT | |
Sharma et al. | Shade selection–An appraisal | |
ILLUMINATE | INCLUDE AN INTRA-ORA |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: TCM, FRANCE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GUILLOT, JULIEN;ROUGIER, FREDERIK;REEL/FRAME:037715/0337 Effective date: 20151126 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO PAY ISSUE FEE |