WO2008041943A1 - Dispositif de mesure et procédé de mesure utilisant ledit dispositif de mesure - Google Patents

Dispositif de mesure et procédé de mesure utilisant ledit dispositif de mesure Download PDF

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Publication number
WO2008041943A1
WO2008041943A1 PCT/SE2007/050717 SE2007050717W WO2008041943A1 WO 2008041943 A1 WO2008041943 A1 WO 2008041943A1 SE 2007050717 W SE2007050717 W SE 2007050717W WO 2008041943 A1 WO2008041943 A1 WO 2008041943A1
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WO
WIPO (PCT)
Prior art keywords
measuring
measuring device
implant
image
dental
Prior art date
Application number
PCT/SE2007/050717
Other languages
English (en)
Inventor
Martin Nilsson
Original Assignee
Biomain Ab
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Biomain Ab filed Critical Biomain Ab
Publication of WO2008041943A1 publication Critical patent/WO2008041943A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0093—Features of implants not otherwise provided for
    • 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
    • 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
    • G16H20/00—ICT specially adapted for therapies or health-improving plans, e.g. for handling prescriptions, for steering therapy or for monitoring patient compliance
    • G16H20/40—ICT specially adapted for therapies or health-improving plans, e.g. for handling prescriptions, for steering therapy or for monitoring patient compliance relating to mechanical, radiation or invasive therapies, e.g. surgery, laser therapy, dialysis or acupuncture

Definitions

  • This invention pertains in general to the field of a measuring device and a measuring method using said measuring device. More particularly the invention relates to a measuring device and a measuring method using said measuring device for the determination of angle and position of a receiving portion of at least one implant.
  • a measuring device and a measuring method of this kind is disclosed in EP 0599578.
  • a dental implant system The goal of a dental implant system is to restore the patient to normal function, comfort, aesthetic, speech and health regardless of the current oral condition.
  • These implant systems are based on the implantation of dental implants, such as dental implants made of biocompatible titanium, through insertion into the patient's jawbone.
  • implants are embedded in the jaw, such as the upper or lower jaw, of a patient in need of restoring the normal function of the dental situation.
  • a prosthesis such as a superstructure, brace and/or bridge, is attached to the implant structure.
  • This prosthesis may replace a tooth or teeth missing in the mouth of the patient.
  • This prosthesis is fixated to the implant or implants by a screw member or members, to insure that prosthesis is properly fixated to the implant or implants.
  • the implants may be provided with a receiving portion in the form of female threads, corresponding to the threaded part of the screw member or members.
  • the prosthesis may in turn be provided with a bonding portion screw holes, for receiving the screw members.
  • both the angle of the treaded part of the implant and relative vertical position of the receiving portion of the implant are important factors necessary to determine to create a prosthesis with bonding portions corresponding to the receiving portion of the implant. It is important that the position and direction of the receiving portion correspond to the bonding portions.
  • the bonding portions do not correspond to the respective receiving portions, the human jaw is subjected to unfavourable strain, which may lead to inflammation due to the stress applied to the implant.
  • osteoadsorption occurs in the jaw bone. This osteoadsorption causes inflammation between the implant and the jaw bone due to the strain applied to the implant.
  • an impression of the dental situation of the patient is used to manufacure a mould.
  • the information about the receiving portions of the implants is then obtained by imprinting with wax. This information may then be transferred to a prosthesis, whereby the positioning and angling of the bonding portion are adapted to the implants.
  • EP 0599578 describes a measuring technique used to determine the direction and position of bonding points in which prosthesis is attached to an implant.
  • measurement points are provided by obtaining at least two images, from different angles and/or positions, of a measuring device with a measuring surface, which measuring device has been mounted to each implant. From the combined information from the shape of the measuring surfaces in the at least two pictures, the information regarding direction and position of the receiving portions of the implants may be obtained. It is necessary to obtain at least two pictures in this method, since the difference in shape of one picture of such a measurement surface and the actual shape of the measurement surface may correspond to more than one direction. This implies that more than one camera and/or more than one picture from one camera has to be used in the evaluation of the angle and position of the receiving portion. This is a time and/or cost consuming procedure .
  • US 2006/0019219 describes a device for determining the position and orientation of the axis of a dental implant disposed directly in the mouth, wherein said devive is to be used in a CAD/CAM system, i.e. a system based on multiple pictures for producing a 3D visualisation.
  • the device comprises a plurality of shaped surfaces (26a, 26b, 26c, 26d), wherein one surface (26a) - concentrically arranged to the rotational axis of the implant - is used for determination of the rotational axis of the implant and axially displaced along the device.
  • US 2006/0019219 is accompanied with the problem that several images have to be taken of said surface (26a) in different angles in respect of the device to accomplish said determination, which is also in line with the general idea of a CAD/CAM system.
  • a CAD/CAM system is an expensive system, why a more inexpensive solution would be of advantage for said determination.
  • US 2006/0019219 is accompanied with the problem that the visualisation of all surfaces, even the part of the surfaces being located behind other more radially extending surfaces, i.e.
  • the part of a surface that may be covered by another axially displaced surface, such as surfaces (26b, 26d), may be impossible if another system than a CAD/CAM system was to be used, such as a system comprising only a few pictures, such as one picture.
  • an improved method for obtaining information with regard to the direction and position of a receiving portion of an implant would be advantageous, and in particular a measuring device allowing for this more time and/or cost effective method be advantageous.
  • the present invention seeks to mitigate, alleviate or eliminate one or more of the above-identified deficiencies and to provide an improved measuring device of the kind referred to, and a measuring method using said measuring device.
  • the measuring device of this kind is characterized by at least two measuring objects, and the measuring method is characterized by using one picture of said measuring device to determine the angle and position of a receiving portion of at least one implant, by using two measuring objects located on said measuring device.
  • Fig. Ia, Ib, and Ic illustrates an embodiment of a measuring device according to the invention
  • Fig. 2 is an embodiment of an arrangement for the measuring method according to the invention.
  • Fig. 3 is an embodiment of an image for the measuring method according to the invention.
  • the following description focuses on embodiments of the present invention applicable to a measuring device, and also to a measuring method using said measuring device. It is appreciated that the measuring method according to the present invention may be performed on a mould or model of the dental situation of a patient, and in the mouth, in vivo, of the patient. For the reason of convenience the Figs. According to this description visualize a patient with no teeth. Naturally, it is within the scope of the present invention to perform the measuring method on patients with not all teeth removed.
  • a measuring device in form of a cylinder is provided.
  • This measuring device may be mounted on an implant to determine the direction, such as angles, and position of a receiving portion of an implant.
  • This measuring device may also be used to obtain information about positional relationships of receiving portions of implants.
  • This particular measuring device is provided with a main body 1 and a bonding portion 2.
  • the bonding portion 2 may for example be a male threading part as shown in Fig. Ia or a stud. During fixation of the measuring device to an implant this bonding portion may be cooperated with a receiving portion of the implant.
  • the receiving portion of the implant may be provided with a female threading part (not shown) matching the male threading part of the measuring device.
  • the main body 1 comprises at least two measuring objects; a first measuring object 3 and a second measuring object 4, according to Fig. Ib.
  • Fig. Ib illustrates the measuring device in the x-z plane.
  • the first measuring object 3 is located on an upper end of the measuring device, as shown in Fig. Ic, wherein the measuring device is shown in the x- y plane.
  • This first measuring object 3 has a defined shape.
  • an image is obtained, according to the illustration in Fig. 2, of the measuring device the shape of the first measuring object 3 is obtained in the image, such as an image according to Fig. 3. From the difference between the real defined shape of the first measuring object 3 and the shape of the first measuring object 3 in the picture information regarding the occlusive plane of the receiving portion of the implant may be obtained.
  • the second measuring object 4 may be the side of the main body 1 of the measuring device.
  • the real shape of the second measuring object 4 is a rectangular with sides corresponding to the height and width of the cylinder.
  • the cross sectional area of the measuring device in a x-y plane corresponds to the first measuring object 3
  • the cross sectional area of the measuring device in a x-z plane corresponds to the second measuring object 4.
  • measuring the position, the direction and/or the occlusive plane of each of the receiving portions means to measure a center and an extending direction of the circular end, i.e. the first measuring object 3, of the measuring device.
  • the position of the receiving portion may also be obtained.
  • the cylinder of the measuring device may have different heights, and appropriate measuring devices are selected so that the upper end of the measuring device forms the occlusive plane when attached to the implant structure.
  • an elongated stud may be provided which is entered to the female thread portion of the implant, and various modification forms of the male thread may be provided.
  • Fig. 2 a measuring method according to one embodiment of the invention is disclosed, in which method the measuring device according to above is used, to determine the position, direction, and/or occlusive plane of a receiving portion of an implant, whereby a maximized fitting between implant (s) and a prosthesis may be obtained:
  • An implant or a plurality of implants is/are implanted in the upper or lower jaw of a patient. This or these implant/implants may be individually embedded in the jaw of the patient.
  • the implant or each of the implants is/are provided with a female thread portion in a receiving portion, which receiving portion is exposed in the mouth of the patient.
  • Each of the female thread portions corresponds to one of a plurality of bonding portions, comprising male thread portions, by which a prosthesis is attached to the implant/implants .
  • a measuring device is attached to measure directions, positional relationship and occlusive plane of the female thread portions of the implant/implants.
  • the measuring device may be in the form of a cylinder having a bonding portion with a male thread, which is screwed into the female thread portion of the implant/implants.
  • a first measuring object 3 is provided to measure a bonding position and the occlusive plane.
  • the measuring device also comprises a second measuring object 4, which may be the side of the main body 1 of the measuring device.
  • a picture or image of the measuring devices is obtained from a predetermined position, for example according to Fig. 3. This position may preferably be selected such that the first and second measuring objects 3 and 4 may be visualized.
  • This picture or image may for example be obtained by the use of an image obtaining means, such as a camera 31.
  • the obtainment of said picture or image may be obtained from the mouth of the patient or from a mould or model of the mouth of the patient, such as a mould or model of an upper or lower jaw of the patient.
  • the image may be obtained by placing an image obtaining means in an angle in respect of the upper or lower jaw, or in respect of the mould or model. This is to ensure that the first measuring object is visualized in said image or picture.
  • the angle with which the image of the mouth or mould, i.e. the dental situation with implant (s), is obtained may vary, as long as the computer in step (D) is informed of which angle is used.
  • such an angle may be selected from the interval of 15° to 60°, such as in the interval of 20° to 40°, such as 25° to 35°.
  • An electronic circuit may be provided in the form of a computer to measure the bonding direction, the positions of the receiving portions and the occlusive plane of the implants.
  • the electronic circuit measures shape, position and positional relationship by means of an image processing means on the basis of the picture or image.
  • the center and the extending direction of the upper end of the first measuring object 3 is measured on the basis of the shape of the measuring object 3 in the picture or image so as to lead to the position and direction of the screw hole of the female thread portion of the receiving portion of the implant .
  • An image processing means determines the shape of the first measuring object 3 and the second measuring object 4 by photographing each measuring device, in the mouth or in a mould or model, by a camera 31, as indicated in Fig. 2.
  • This image processing means may also perform an edge-fined treatment. That is to say, the shape of the edge of the first and second measuring objects 3 and 4 is read by a read-out device in the electronic circuit.
  • the shape of the first measuring object 3 may be in the form of an ellipsis, and a part of the ellipsis is specified by the electric mouse.
  • the computer of the electronic circuit calculates the position and the direction of the screw hole of the female thread portion of the receiving portion of the implant in a calculator device.
  • the calculated position of the receiving portion of the implant/implants may be stored in a memory circuit in the computer. Thereafter, the rest of all the edge of the first measuring object 3 is processed with the edge-fined treatment. Then the position and direction of the screw hole of the female thread portion in the receiving portion of each of the implants may be measured to memorize them in the computer. On the basis of the position of the first measuring object 3, the occlusive plane is also measured.
  • segmentation is a well-known concept within the field of image analysis in which an image is partitioned into multiple regions (sets of pixels), according to a given criterion.
  • the goal of segmentation is generally to locate structures of interest within the image.
  • a subgroup to segmentation is the commonly known region growing technique, which is a technique that starts from a seed voxel and then expands to all voxels of the image dataset.
  • the "growing" term implies that similar pixels adjacent to the seed pixels are grouped together based on some criterion and thus similar pixels successively grow into similar structure (s) comprised in the image dataset.
  • the region growing may proceed to all pixels of the image of the human body, e.g. the trachea, airways and lungs, starting from the seed voxel.
  • the orientation of the measuring device may be calculated by the electric circuit.
  • the computer and /or electric circuit is comprised in a processor with a memory.
  • the processor may be any of variety of processors, such as Intel or AMD processors, CPUs, microprocessors, Programmable Intelligent Computer (PIC) microcontrollers, Digital Signal Processors (DSP), etc.
  • PIC Programmable Intelligent Computer
  • DSP Digital Signal Processors
  • the memory may be any memory capable of storing information, such as Random Access Memories (RAM) such as, Double Density RAM (DDR, DDR2), Single Density RAM (SDRAM), Static RAM (SRAM), Dynamic RAM (DRAM), Video RAM (VRAM), etc.
  • RAM Random Access Memories
  • DDR Double Density RAM
  • SDRAM Single Density RAM
  • SRAM Static RAM
  • DRAM Dynamic RAM
  • VRAM Video RAM
  • the memory may also be a FLASH memory such as a USB, Compact Flash, SmartMedia, MMC memory, MemoryStick, SD Card, MiniSD, MicroSD, xD Card, TransFlash, and MicroDrive memory etc.
  • FLASH memory such as a USB, Compact Flash, SmartMedia, MMC memory, MemoryStick, SD Card, MiniSD, MicroSD, xD Card, TransFlash, and MicroDrive memory etc.
  • the scope of the invention is not limited to these specific memories.
  • Titanium provides a relatively matt surface. It is also possible to paint the main body 1, and thereby the first and second measuring objects 3 and 4, with a paint giving a matt surface. Such paint may for example be based on titanium dioxide.
  • One example of manufacturing a prosthesis by the aid of measurement devices and measurement method according to the invention may comprise the steps of (i) performing any of the methods described above in respect of obtaining information regarding orientation or orientation and positional relationship, or carrying out a laser beam scanning, in the mouth, in which an implant or plurality of the implants is/are embedded, with the use of measuring devices, (ii) memorizing the measurement results by the computer in a computer readable medium, such as a memory or an electronic circuit, (iii) shaping, such as milling, the side intended to face the implant/implants, for example by the aid of a three-dimensional cutter, to correspond the side of the prosthesis intended to face the implant/implants to the oral or dental situation of the patient, and/or manufacturing a frame, such as a superstructure, on the basis of the occlusive plane and the oral shape memorized by the computer, from a metal, ceramic material and/or synthetic resin which substantially forms a basic structure of the superstructure and therefore also the prosthesis, (iv) providing, on the basis of
  • the combination between the prosthesis according to embodiments of the invention and the implant/implants enables to protect the implants against unfavorable stress, so as to avoid inflammation at an interface between the implant structure and the human jaw. This enables to substantially eliminate the necessity of providing an end play with the screw hole, thus preventing from microbes and foreign fouling matters being caught up between the implant structure and the client's jaw. It is also possible to measure the occlusive plane so as to improve the manufacturing accuracy of the prosthesis by using the measuring device. Also, it is time and cost effective to obtain enough information from one picture/image for manufacturing a prosthesis with this advantageous fitting to the implant/implants.
  • first and second measuring object may have other shapes than the shapes described above.
  • These other shapes of the first measuring object 3 may for example be rectangular, triangular, or polygonal.

Abstract

L'invention concerne un dispositif de mesure, un procédé de mesure, un procédé de fabrication, et un support lisible par un ordinateur, ledit dispositif de mesure comprenant au moins deux objets de mesure (3, 4). Ce dispositif de mesure peut être monté sur un implant dentaire dans une bouche d'un patient ou sur un modèle de la bouche du patient. Une image est obtenue desdits dispositifs de mesure montés, utilisant des moyens de réalisation d'image, et l'image est analysée pour déterminer l'orientation et la relation de position desdits implants dentaires, à l'aide de la forme dudit premier objet de mesure (3) et dudit second objet de mesure (4) dudit dispositif de mesure dans ladite image pour déterminer la relation d'orientation et de position des implants dentaires.
PCT/SE2007/050717 2006-10-06 2007-10-05 Dispositif de mesure et procédé de mesure utilisant ledit dispositif de mesure WO2008041943A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0602116 2006-10-06
SE0602116-6 2006-10-06

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WO2008041943A1 true WO2008041943A1 (fr) 2008-04-10

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010097214A1 (fr) * 2009-02-26 2010-09-02 Nobel Biocare Services Ag Dispositif pour indiquer la position et l'orientation d'un implant dentaire
WO2014128054A1 (fr) 2013-02-20 2014-08-28 Gc Europe Aide pour implant dentaire précalibré
WO2017029670A1 (fr) * 2015-08-17 2017-02-23 Optical Metrology Ltd. Cartographie intrabuccale de cavités buccales édentées ou partiellement édentées

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4837732A (en) * 1986-06-24 1989-06-06 Marco Brandestini Method and apparatus for the three-dimensional registration and display of prepared teeth
EP0599578A2 (fr) * 1992-11-25 1994-06-01 Kabushiki Kaisha Egawa Dispositif et méthode pour une structure à implanter
US6287119B1 (en) * 1993-07-26 2001-09-11 Nobel Biocare Ab Method of manufacturing a prosthesis to be fixed to implants in the jawbone of a patient, and a system for manufacturing such prostheses
US20030219148A1 (en) * 2002-05-24 2003-11-27 Scharlack Ronald S. Method and system for three-dimensional modeling of object fields
US20060019219A1 (en) * 2004-07-20 2006-01-26 Gunter Saliger Method to determine position and orientation of the axis of a dental implant disposed directly in the mouth of the patient as well as a mounting piece

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4837732A (en) * 1986-06-24 1989-06-06 Marco Brandestini Method and apparatus for the three-dimensional registration and display of prepared teeth
EP0599578A2 (fr) * 1992-11-25 1994-06-01 Kabushiki Kaisha Egawa Dispositif et méthode pour une structure à implanter
US6287119B1 (en) * 1993-07-26 2001-09-11 Nobel Biocare Ab Method of manufacturing a prosthesis to be fixed to implants in the jawbone of a patient, and a system for manufacturing such prostheses
US20030219148A1 (en) * 2002-05-24 2003-11-27 Scharlack Ronald S. Method and system for three-dimensional modeling of object fields
US20060019219A1 (en) * 2004-07-20 2006-01-26 Gunter Saliger Method to determine position and orientation of the axis of a dental implant disposed directly in the mouth of the patient as well as a mounting piece

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010097214A1 (fr) * 2009-02-26 2010-09-02 Nobel Biocare Services Ag Dispositif pour indiquer la position et l'orientation d'un implant dentaire
KR20110121684A (ko) * 2009-02-26 2011-11-08 노벨 바이오케어 서비시스 아게 치과 임플란트의 위치 및 방위를 나타내는 디바이스
CN102307539A (zh) * 2009-02-26 2012-01-04 诺贝尔生物服务公司 用于表示牙齿种植体的位置和取向的装置
JP2012518502A (ja) * 2009-02-26 2012-08-16 ノベル バイオケア サーヴィシィズ アーゲー 歯科インプラントの位置及び配向を指示するための装置
CN102307539B (zh) * 2009-02-26 2014-03-12 诺贝尔生物服务公司 用于表示牙齿种植体的位置和取向的装置
EP2712573A3 (fr) * 2009-02-26 2015-05-06 Nobel Biocare Services AG Dispositif pour indiquer la position et l'orientation d'un implant dentaire
AU2010219145B2 (en) * 2009-02-26 2015-11-12 Nobel Biocare Services Ag Device for indicating the position and orientation of a dental implant
JP2016174973A (ja) * 2009-02-26 2016-10-06 ノベル バイオケア サーヴィシィズ アーゲー 歯科インプラントの位置及び配向を指示するための装置
KR101697162B1 (ko) * 2009-02-26 2017-01-17 노벨 바이오케어 서비시스 아게 치과 임플란트의 위치 및 방위를 나타내는 디바이스
WO2014128054A1 (fr) 2013-02-20 2014-08-28 Gc Europe Aide pour implant dentaire précalibré
WO2017029670A1 (fr) * 2015-08-17 2017-02-23 Optical Metrology Ltd. Cartographie intrabuccale de cavités buccales édentées ou partiellement édentées

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