WO2009026943A1 - Production de prothèses dentaires - Google Patents

Production de prothèses dentaires Download PDF

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Publication number
WO2009026943A1
WO2009026943A1 PCT/EP2007/007480 EP2007007480W WO2009026943A1 WO 2009026943 A1 WO2009026943 A1 WO 2009026943A1 EP 2007007480 W EP2007007480 W EP 2007007480W WO 2009026943 A1 WO2009026943 A1 WO 2009026943A1
Authority
WO
WIPO (PCT)
Prior art keywords
region
spatial
dental prosthesis
spatial form
tooth
Prior art date
Application number
PCT/EP2007/007480
Other languages
German (de)
English (en)
Inventor
Andreas Hoffmann
Tim Uferkamp
Original Assignee
Dentales Service Zentrum Gmbh & Co. Kg
Gerd Uferkamp Dental Gmbh
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 Dentales Service Zentrum Gmbh & Co. Kg, Gerd Uferkamp Dental Gmbh filed Critical Dentales Service Zentrum Gmbh & Co. Kg
Priority to PCT/EP2007/007480 priority Critical patent/WO2009026943A1/fr
Publication of WO2009026943A1 publication Critical patent/WO2009026943A1/fr

Links

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
    • A61C13/0003—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
    • A61C13/00—Dental prostheses; Making same
    • A61C13/0003—Making bridge-work, inlays, implants or the like
    • A61C13/0006—Production methods
    • 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
    • A61C13/0022—Blanks or green, unfinished dental restoration parts

Definitions

  • the invention relates to a method and an apparatus for the production of dental prostheses.
  • Dentures are dental prostheses which have a mucous membrane area and a tooth area adjacent thereto.
  • the mucosal area serves to support and attach the dental prosthesis to a tooth-free area of a mandible or maxilla, while the tooth area replaces the missing teeth of the respective jaw.
  • a dental prosthesis can replace part of the teeth of a mandible or maxilla, or all teeth of a jaw.
  • the common way to make dentures is to take one or more impressions from the affected and opposing jaws of each patient and make a model based on those impressions.
  • the model is then the basis for the formation of the denture both to the mucosal area of the denture to the tooth-free area of the respective jaw, as well as to the tooth area on teeth of the opposite jaw and possibly adjacent teeth of the jaw for the denture is intended to adapt.
  • prefabricated computer-milled ceramic denture teeth can be used, which provide a perfect basis for a gearing among each other in a full denture, ie a denture for both the lower jaw and the upper jaw.
  • Data record determined, which describes the spatial form of a matching in the cavity inlay.
  • the data record describing the spatial form of the inlay is displayed on a screen three-dimensionally together with the data sets of the scanned spatial forms to allow a dentist to rework the space shape of an outer surface of the inlay automatically determined by the computer as appropriate. Subsequently, with the data thus obtained a machine for material decreasing working out of
  • the inlay is then cemented into the cavity of the respective tooth.
  • the ceramic body can be selected for its color on the color of the tooth into which the inlay is to be cemented.
  • the invention has for its object to provide a method and an apparatus for the production of dental prostheses, which allow the cost-effective production of individual dental prostheses.
  • the object of the invention is achieved by a method having the features of independent claim 1 and a device having the features of independent Patent claim 11 solved.
  • Preferred embodiments of the new method are described in the subclaims 2 to 9.
  • the claim 10 relates to the use of a plastic preform in the new method.
  • Preferred embodiments of the new device are described in the subclaims 11 to 13.
  • the independent claim 14 additionally describes a novel process for the production of dental prosthesis substantially corresponding new process for the production of epithetics.
  • Claim 15 accordingly describes one of the new device for the production of dental prosthesis substantially corresponding new device for the production of epithetics
  • the pressure of impressions is replaced by a mechanical and / or optical scanning of a mucosal structure in a tooth-free region of a mandible or maxilla, in order to directly determine a record describing the spatial shape of the mucosal structure.
  • the same algorithms can be used as have been used heretofore for the optical scanning of a cavity in a tooth for the production of a lays.
  • Which exact scanning method is used, for example, which exact optical technique is irrelevant.
  • three-dimensional recording techniques in which the spatial form of interest is recorded from multiple directions and optical scanning methods using spot or strip light may be employed. In the latter case, for example, one speaks of so-called Lichtieriabtastung.
  • the data record describing the spatial shape of the mucosal structure is used in the invention to describe a spatial form of a removable denture
  • the spatial shape of the denture has a to the spatial form of
  • Mucosal structure complementary mucosal area and adjacent thereto
  • the spatial form of the mucous membrane area facing the respective jaw can, in a first approximation, have the same spatial form, ie. H. the same surface course, albeit with a different sign, as the mucous membrane structure, in which he in the use of the
  • the adjacent to the mucous membrane area Tooth area may be generated automatically using additional data or customized by a performer of the new method.
  • the machine thus obtained which describes the spatial form of the dental prosthesis, drives a machine for removing material from the working space of the dental prosthesis from a plastic preform.
  • the plastic preform has a region of a first and an adjacent region of a second color.
  • the two colors are adapted to form the mucous membrane area of the dental prosthesis in the area of the plastic preform of the first color and the tooth area in the area of the plastic preform of the second color. That is, the first color is usually a pink tone, while the second color is a pale yellow hue.
  • plastic preforms with different pink and white-yellow shades can be selected.
  • the size of the plastic preform can be selected to avoid unnecessary processing costs in terms of its shape and size matched to the spatial shape of the dental prosthesis. Also for this purpose, a plurality of plastic preforms are available for selection.
  • the material decreasing working out can be done for example by grinding and / or milling of the plastic preform. It can also be carried out first a milling step, which then followed by a grinding step for finishing. This can be followed either already in the machine or manually followed by a polishing step. The denture, however, is in any case substantially completed by the machine.
  • the design of the new dental prosthesis exclusively made of plastic it can be sufficiently stable for long-term use.
  • the process of adaptation of the spatial form of the denture descriptive record on remaining teeth of the respective jaw can be largely automated.
  • the spatial shape of a portion of a jaw opposite to the tooth-free portion of the lower jaw or upper jaw is to be scanned, and the spatial shape of the denture descriptive record is to be determined taking into account the spatial shape of the area of the opposing jaw.
  • a relative position of a jaw which lies opposite the tooth-free region of the lower jaw or upper jaw, can also be scanned in order to use this relative position of the opposing jaw in the determination of the data set describing the three-dimensional shape of the dental prosthesis.
  • a spatial form for the dental prosthesis can be determined automatically, which ensures a toothing with the remaining teeth of the opposite jaw.
  • An even more perfect automatic adaptation of the dental prosthesis to the individual conditions can be achieved if the relative position of the opposing jaw in different positions of the jaw is scanned to each other.
  • grooves in the chewing surfaces can be matched to the possible relative positions of the jaws.
  • the data set describing the spatial shape of the dental prosthesis can be determined taking into account an occlusal plane and / or an occlusion direction between the opposing pines.
  • the mucosal structure in the tooth-free region of the mandible or maxilla in scanned various oral situations to determine the descriptive of the spatial shape of the mucosal structure record. These different oral situations, for example, by blowing, sucking and / or by Muscular rest of or be adjusted by the respective patient. Changing spatial forms of the mucous membrane structure provide important information on the local thickness and deformability of the mucous membrane.
  • Scanning determined data sets are visualized in a three-dimensional representation, before the machine is driven. This allows a control of the space shape automatically determined for the dental prosthesis.
  • a three-dimensional representation for visualization is meant here usually no holographic representation, but the reproduction of a perspective view with a variable direction of view, which gives a three-dimensional impression even when displayed on a two-dimensional screen.
  • the data record describing the spatial form of the mucosal structure can be changed by means of graphical tools that act on this three-dimensional representation. Performing the new method can then make changes to the three-dimensional representation to optimize the spatial shape of the denture, which automatically affect the record of the denture, which is then used to drive the machine for working out the denture from the plastic preform.
  • the new method is not only suitable for the production of dentures. It is also suitable for the production of epithetics for the mouth and facial area.
  • it comprises the steps of: mechanically and / or optically scanning a surface structure in a region of a head to determine a data set describing the spatial form of the surface structure; Determining a data set describing the spatial form of an epithesis or an opturator, wherein the spatial form of the epithesis or of the opturator has an abutment region that is complementary to the spatial form of the surface structure and regions facing away from it; and driving a machine with the spatial form of the epithesis or of the opturator descriptive record for material decreasing working out of the spatial form of the epithesis or the opturator of a plastic preform having a region of a first and an adjoining region of a second material, wherein the deformability and / or the color of the first and second materials differ from each other.
  • one material may be hard to replace a missing bone area while the other material is soft to
  • Fig. 1 is a flowchart illustrating the implementation of the new method for
  • Fig. 2 shows a plastic preform as used in the new method. DESCRIPTION OF THE FIGURES
  • the new method for the production of dental prostheses sketched in FIG. 1 on the basis of the new device used here begins with the step of scanning in which a scanning device 1 scans at least one mucosal structure in a tooth-free region of a lower jaw or upper jaw by mechanical and / or optical scanning the spatial form of the mucosal structure descriptive record is determined.
  • a scanning device 1 scans at least one mucosal structure in a tooth-free region of a lower jaw or upper jaw by mechanical and / or optical scanning the spatial form of the mucosal structure descriptive record is determined.
  • the spatial shapes of adjacent to the tooth-free area teeth of the lower jaw or upper jaw or a portion of a jaw, which is opposite to the tooth-free area of the lower jaw or upper jaw scanned.
  • the relative position of the opposing jaw relative to the lower jaw or upper jaw with the tooth-free area can also be determined.
  • the mucosal structure in the tooth-free region of the lower jaw or upper jaw is scanned in different oral situations, which are caused, for example, by suction, bladder or muscle rest from or in the respective patent.
  • the scanning can be done by a variety of such as common optical methods for detecting three-dimensional structures. It can also be a mechanical scan. As a rule, it will be a scanning scanning with an optical or mechanical probe that detects the spatial shape of the mucosal structure point or line by line.
  • a computer 3 which is provided with a screen 4 and an input device 5.
  • the computer 3 calculates with a software designed for this purpose from the data set 2 a data record 6 which describes the spatial form of a removable dental prosthesis 8 for filling the tooth-free region of the lower jaw or upper jaw.
  • this data set 6 is displayed together with the data set 2, which describes the spatial shape of the mucosal structure, on a screen 4 in a three-dimensional representation.
  • Three-dimensional representation means that the respective spatial forms are displayed under selectable viewing direction with the course of their boundary lines in space.
  • the spatial form of the dental prosthesis 8 can be manipulated on the screen 4 via the input device 5, which may comprise a keyboard as well as, for example, a mouse, as shown here. Thus, at the same time a manipulation of the associated data set 6. Thus, a perform the new method intervention in the determination of the spatial shape of the dental prosthesis 8.
  • the spatial form of the denture 8 descriptive record 6 is then transmitted to a machine 7, the a plastic preform, which will be described in more detail in connection with FIG. 2, decreasing material, the denture 8 works out.
  • the dental prosthesis 8 has a mucosal area 9 and a tooth area 10, which are worked out of areas of the plastic preform with different colors.
  • the preform 1 preferably consists throughout of plastic of the same composition, which is colored differently in the regions 12 and 13, but which is connected in a closed manner over the boundary between the regions 12 and 13.
  • the spatial form of the preform 11 may be adapted to the denture 8 in order to remove as little material as possible from the preform.
  • the colors of areas 12 and 13 may also be individually selected depending on the circumstances of the individual patient by offering a plurality of preforms 11 of different colors and different color combinations.

Abstract

L'invention concerne la production de prothèses dentaires selon les étapes suivantes : balayage mécanique et/ou optique d'une structure de muqueuse dans une zone exempte de dents d'une mâchoire inférieure ou supérieure pour déterminer un enregistrement (2) décrivant la forme spatiale de la structure de muqueuse; détermination d'un enregistrement (6) décrivant la forme spatiale d'une prothèse dentaire amovible (8), la forme spatiale de la prothèse dentaire (8) présentant une zone de muqueuse (9) complémentaire de la forme spatiale de la structure de muqueuse ainsi qu'une zone de dent voisine (10); commande d'une machine (7) au moyen de l'enregistrement (6) décrivant la forme spatiale de la prothèse dentaire (8) en vue du façonnage par enlèvement de matière de la forme spatiale de la prothèse dentaire (8) dans une ébauche plastique qui présente une zone ayant une première couleur et une zone voisine de la première et ayant une deuxième couleur, la zone de muqueuse de la forme spatiale de la prothèse dentaire (8) étant réalisée dans la zone de l'ébauche plastique ayant la première couleur et la zone de dent (10) étant réalisée dans la zone de l'ébauche plastique ayant la deuxième couleur.
PCT/EP2007/007480 2007-08-27 2007-08-27 Production de prothèses dentaires WO2009026943A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/007480 WO2009026943A1 (fr) 2007-08-27 2007-08-27 Production de prothèses dentaires

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/007480 WO2009026943A1 (fr) 2007-08-27 2007-08-27 Production de prothèses dentaires

Publications (1)

Publication Number Publication Date
WO2009026943A1 true WO2009026943A1 (fr) 2009-03-05

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PCT/EP2007/007480 WO2009026943A1 (fr) 2007-08-27 2007-08-27 Production de prothèses dentaires

Country Status (1)

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WO (1) WO2009026943A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010057584A1 (fr) * 2008-11-18 2010-05-27 Heraeus Kulzer Gmbh Bloc à fraiser pour fabriquer des prothèses partielles ou totales avec le procédé de cao/fao
WO2011077175A1 (fr) * 2009-12-23 2011-06-30 Haraszti Gyoergy Procédé de création d'une prothèse dentaire amovible, et fabrication associée de la prothèse dentaire
WO2013186315A2 (fr) 2012-06-15 2013-12-19 Vita Zahnfabrik H. Rauter Gmbh & Co. Kg Procédé de préparation d'une prothèse dentaire totale ou partielle

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0054785A1 (fr) * 1980-12-24 1982-06-30 Werner H. Dr.med.dent. Mörmann Procédé de réalisation d'élements rapportés médicaux et dentaires, alloplastiques, endoprothétiques et exoprothétiques
EP0091876A1 (fr) * 1982-04-14 1983-10-19 Duret, François Dispositif de prise d'empreinte par des moyens optiques, notamment en vue de la réalisation automatique de prothèses
WO1990013268A1 (fr) * 1989-05-12 1990-11-15 Rotsaert Henri L Fabrication de dents artificielles et de couronnes
WO1991007141A1 (fr) * 1989-11-20 1991-05-30 Wolfgang Becker Procede de fabrication d'une prothese dentaire
DE4020433A1 (de) * 1990-06-27 1992-01-02 Wolfgang Becker Verfahren zur erzeugung einer mit einem ventilrand versehenen basis fuer eine zahnprothese
DE4025728A1 (de) * 1990-08-14 1992-02-20 Wolfgang Becker Verfahren zur herstellung einer zahnprothese mit einer mit einer dateneingabeeinheit versehenen fraeseinrichtung
DE19804921A1 (de) * 1998-02-07 1999-09-23 Dierk Ellerbrock Herstellungsverfahren zu "System bon ear"
WO2002009612A1 (fr) * 2000-07-31 2002-02-07 O'brien Dental Lab, Inc. Blocs de fraisage destines a la fabrication de protheses dentaires, protheses dentaires associees et leurs procedes de fabrication
US6599125B1 (en) * 1999-08-27 2003-07-29 University Of Connecticut Prefabricated components for dental appliances
EP1832245A1 (fr) * 2006-03-08 2007-09-12 Dentales Service Zentrum GmbH & Co. KG Fabrication de prothèse dentaire

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0054785A1 (fr) * 1980-12-24 1982-06-30 Werner H. Dr.med.dent. Mörmann Procédé de réalisation d'élements rapportés médicaux et dentaires, alloplastiques, endoprothétiques et exoprothétiques
EP0091876A1 (fr) * 1982-04-14 1983-10-19 Duret, François Dispositif de prise d'empreinte par des moyens optiques, notamment en vue de la réalisation automatique de prothèses
WO1990013268A1 (fr) * 1989-05-12 1990-11-15 Rotsaert Henri L Fabrication de dents artificielles et de couronnes
WO1991007141A1 (fr) * 1989-11-20 1991-05-30 Wolfgang Becker Procede de fabrication d'une prothese dentaire
DE4020433A1 (de) * 1990-06-27 1992-01-02 Wolfgang Becker Verfahren zur erzeugung einer mit einem ventilrand versehenen basis fuer eine zahnprothese
DE4025728A1 (de) * 1990-08-14 1992-02-20 Wolfgang Becker Verfahren zur herstellung einer zahnprothese mit einer mit einer dateneingabeeinheit versehenen fraeseinrichtung
DE19804921A1 (de) * 1998-02-07 1999-09-23 Dierk Ellerbrock Herstellungsverfahren zu "System bon ear"
US6599125B1 (en) * 1999-08-27 2003-07-29 University Of Connecticut Prefabricated components for dental appliances
WO2002009612A1 (fr) * 2000-07-31 2002-02-07 O'brien Dental Lab, Inc. Blocs de fraisage destines a la fabrication de protheses dentaires, protheses dentaires associees et leurs procedes de fabrication
EP1832245A1 (fr) * 2006-03-08 2007-09-12 Dentales Service Zentrum GmbH & Co. KG Fabrication de prothèse dentaire

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010057584A1 (fr) * 2008-11-18 2010-05-27 Heraeus Kulzer Gmbh Bloc à fraiser pour fabriquer des prothèses partielles ou totales avec le procédé de cao/fao
WO2011077175A1 (fr) * 2009-12-23 2011-06-30 Haraszti Gyoergy Procédé de création d'une prothèse dentaire amovible, et fabrication associée de la prothèse dentaire
WO2013186315A2 (fr) 2012-06-15 2013-12-19 Vita Zahnfabrik H. Rauter Gmbh & Co. Kg Procédé de préparation d'une prothèse dentaire totale ou partielle
WO2013186315A3 (fr) * 2012-06-15 2014-03-20 Vita Zahnfabrik H. Rauter Gmbh & Co. Kg Procédé de préparation d'une prothèse dentaire totale ou partielle
CN104363857A (zh) * 2012-06-15 2015-02-18 维他牙科产品有限公司 用于制备部分或全口牙科用修复体的方法
US10299898B2 (en) 2012-06-15 2019-05-28 Vita Zahnfabrik H. Rauter Gmbh & Co. Kg Method for preparing a partial or full dental prosthesis
EP3610828A1 (fr) 2012-06-15 2020-02-19 VITA-ZAHNFABRIK H. Rauter GmbH & Co. KG Procédé de préparation d'une prothèse dentaire partielle ou complète

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