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WO2003032861A1 - Procede et element profile pour la production d'une prothese dentaire - Google Patents

Procede et element profile pour la production d'une prothese dentaire Download PDF

Info

Publication number
WO2003032861A1
WO2003032861A1 PCT/EP2002/008737 EP0208737W WO03032861A1 WO 2003032861 A1 WO2003032861 A1 WO 2003032861A1 EP 0208737 W EP0208737 W EP 0208737W WO 03032861 A1 WO03032861 A1 WO 03032861A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaped element
shaped
processing
preformed
molded
Prior art date
Application number
PCT/EP2002/008737
Other languages
German (de)
English (en)
Inventor
André Schöne
Markus Vollmann
Original Assignee
Vita Zahnfabrik H. Rauter Gmbh & Co. Kg
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 Vita Zahnfabrik H. Rauter Gmbh & Co. Kg filed Critical Vita Zahnfabrik H. Rauter Gmbh & Co. Kg
Publication of WO2003032861A1 publication Critical patent/WO2003032861A1/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
    • 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 a molded element for the production of dentures.
  • the dental prosthesis which is, for example, a crown, a bridge, an inlay or an onlay, consists of ceramic, in particular an oxide ceramic material, such as aluminum oxide, magnesium oxide, zirconium oxide, titanium oxide and / or combinations thereof. Furthermore, the ceramic dental prosthesis can have, for example, small amounts of silicate additives.
  • Dentures are generally parts such as crowns, bridges, inlays and onlays that are placed on a patient's natural teeth in order to largely restore the natural function of the teeth. Elaborate procedures are required to manufacture dentures that must be extremely precise and therefore only have minimal tolerances. First of all, a dentist has to prepare and extract the part of the bit to be replaced. After that, z. B. made by an impression with conventional methods a model. In the case of ceramic dentures, the manufacture of the dental prosthesis is then usually carried out by copy milling. In this case, the final shape of the denture is reproduced from a cuboid blank made of soft unsintered ceramic by mechanical processing, such as drilling, milling and / or grinding, on the basis of the model created.
  • Blanks used here are described, for example, in DB 196 12 699.
  • the dentures made of soft ceramic are glass-filtered for hardening.
  • the afterthought Glass infiltration is very time consuming.
  • the subsequent glass infiltration has the disadvantage that an additional high-temperature furnace is required.
  • Substantially harder and therefore more permanent dentures can be achieved by using fully sintered ceramic. Since strong shrinkage occurs during full sintering of ceramics, it is not possible to fully sinter a denture made from a soft ceramic after reaching the final shape. The degree of shrinkage during full sintering is u. a. depending on the thickness of the dentures and therefore very different. It is therefore not possible to take the shrinkage into account by adding the appropriate material. The narrow tolerances required cannot be achieved here.
  • the object of the invention is to provide a method for the production of dentures with which the production of dentures from fully sintered ceramic is economically possible. It is also an object of the invention to provide a shaped element suitable for this.
  • the object is achieved according to the invention by a method according to claim 1 and by a shaped element according to claim 10.
  • a preformed shaped element made of ceramic is produced.
  • the preformed shaped element is not a cuboidal blank used in accordance with the prior art, but a shaped element which is already preformed in such a way that areas which frequently have to be ground down in order to achieve a final state of the denture are not present.
  • a shaped element preformed according to the invention from which a crown is to be produced, already has a preformed inner bore into which the remaining healthy part of the tooth is later inserted.
  • a shaped element preformed according to the invention has the advantage that less material has to be removed when the shaped element is subsequently machined to achieve the final state of the denture.
  • the shaped element is preferably preformed such that it has a shape approximating the final state of the denture. This has the advantage that, compared to cuboid blanks, only a considerably smaller amount of material has to be removed.
  • the preformed shape of the molded element is preferably approximated to the final state of the denture in such a way that less than 50%, in particular less than 30% and particularly preferably less than 10% of the molded element have to be removed during the processing of the molded element to the final state.
  • the fully sintered shaped element can be mechanically processed.
  • the required processing times for the preformed shaped elements according to the invention are considerably shorter than for cuboid blanks.
  • the method according to the invention has the advantages that, compared to the prior art, considerably less material has to be removed and thus tools such as end mills with low removal rates can also be used economically.
  • a standard shaped element for each group.
  • a group includes, for example, similar inlay forms for a molar tooth or frequently occurring forms of crowns for an incisor, etc.
  • the machining allowance for a standard shaped element is selected such that different individualized denture shapes can be worked out in detail from different machining of the standard shaped element from a single standard shaped element.
  • a system from a set of standard shaped elements.
  • a set of standard form elements contains, for example, one standard form element for all groups of denture molds.
  • the number of groups of dentures can be varied. With a relatively small number of groups, each standard form element must comprise a relatively large number of individual denture forms. The consequence of this is that more material has to be removed to produce the final state of the denture.
  • a finer subdivision can take place, so that each standard form element only has to comprise a small number of individual denture forms.
  • a maximum number of ten standard shaped elements is preferably provided in the system for each tooth type, for example for a specific molar tooth. In particular, this number is a maximum of five standard shaped elements per tooth type. For example, a single tooth can be defined as the tooth type. However, further subdivisions are also possible, for example depending on the jaw size and the like.
  • a set of shaped elements for example having a maximum of 30 standard shaped elements, is generated such that with this set of shaped elements, a corresponding standard shaped element in the set of shaped elements in at least 80% of the dental prosthesis forms of a tooth type that occur in the population is included. This is preferably the case for at least 90% and particularly preferably for at least 95% of the population.
  • Includes to reduce costs a set of shaped elements preferably a maximum of 20 and particularly preferably a maximum of 10 standard shaped elements.
  • the production costs for the standard shaped elements can be optimized in comparison with the processing costs by the number of standard shaped elements.
  • the shaped elements according to the invention are preferably produced in a casting process, in particular an injection molding process. With such methods, a molded element preformed according to the invention can be produced from ceramic in a simple manner.
  • the preformed shaped element is produced from a relatively soft solid body.
  • the ceramic solid is produced in particular by mechanical processing, such as grinding, drilling and / or milling.
  • the solid body is preferably pre-sintered into a shaped element before processing.
  • the pre-sintered solid body is relatively soft compared to fully sintered bodies and is therefore easy to machine.
  • the pre-sintering of the full body has the advantage that precise processing is possible. After processing the solid body into a preformed shaped element, it is hardened by full sintering in accordance with the method according to the invention. This is followed by the final processing.
  • the Vickers hardness of a fully sintered molded element according to the invention is preferably in the range from 1000 to 1400 HV 10 for zinc oxide and in the range from 2000 to 2400 HV 10 for aluminum oxide.
  • the fully sintered molded element is preferably machined to achieve the final state of the denture by mechanical processing, in particular grinding, drilling and / or milling.
  • mechanical processing in particular grinding, drilling and / or milling.
  • Known copying machines can be used for this purpose, for example.
  • numerically controlled machines that use the image processing Establish the final state of the denture.
  • images of the healthy tooth in which a denture is to be inserted are created and processed using digital image processing.
  • post-processing can be carried out.
  • the ceramic dental prosthesis can be polished.
  • the dentures can be reworked by so-called tipping. Tipping is a hot isostatic pressing of the denture.
  • the invention further relates to a molded element for the production of dentures.
  • the shaped element consists of fully sintered ceramic and has a shape approximating the final shape of the denture.
  • the shaped element according to the invention is preferably produced in the method described above and has the corresponding advantages.
  • the preformed shaped element preferably has a machining allowance to achieve the final state of less than 100%.
  • a machining allowance to achieve the final state of less than 100%. The result of this is that a maximum of 50% of the entire material of the preformed shaped element must be removed during processing.
  • dental prosthesis forms are preferably combined into groups and a standard shaped element is formed for each group.
  • Such standard shaped elements preferably have a recess, so that a thin-walled shaped element is formed.
  • the recess is, for example, a standard shaped element for a crown, the recess into which the healthy residual tooth is inserted.
  • Corresponding preformed recesses can also be provided, for example, in the case of standard shaped elements for molars for the occlusal surfaces, etc.
  • Preferred standard shaped elements which are particularly suitable for crowns, have a truncated pyramid-like outer shape, which is particularly hollow.
  • the shaped elements In order to be able to clamp the shaped elements according to the invention in a processing machine, such as a copying machine, the shaped elements have a holding attachment.
  • the retaining attachment is preferably connected in one piece to the shaped element.
  • the approach is thus already in the manufacture of the preformed molded element, i. H. for example with injection molding.
  • This has the advantage that the preformed shaped element does not have to be connected to a holding attachment, such as a metal pin or the like. It is therefore also not necessary when connecting the holding attachment to the shaped element to ensure that the position of the holding attachment is defined with respect to the preformed shaped element. This would be extremely difficult, especially in the case of preformed shaped elements with irregular outer contours, and would therefore be time and cost intensive.
  • the shaped element preferably also has an alignment means for aligning the shaped element in the processing machine.
  • an alignment means for example, an extension or a recess can be provided, which interacts with a corresponding counterpart on the processing machine, so that the position of the molding element in the processing machine is always defined. This is very advantageous in particular in the case of shaped elements with complicated outer shapes, since this eliminates the need for an alignment by a user.
  • the alignment means is preferably provided directly on the holding attachment.
  • the shaped element according to the invention can advantageously be further developed in accordance with the shaped element produced with the aid of the method according to the invention.
  • the invention is explained in more detail below on the basis of preferred exemplary embodiments.
  • Fig. 1 is a schematic sectional view of a first
  • Fig. 2 is a schematic plan view of that shown in Fig. 1
  • FIG. 3 is a perspective schematic view of a second preferred embodiment of a standard
  • the figures 1 and 2 show a standard shaped element which is particularly suitable for machining a crown.
  • the shaped element shown has an outer contour that is rotationally symmetrical with respect to the axis of rotation 10. This is a truncated cone, the diameter of which decreases from an upper side 12 towards a lower side 14.
  • the outer contour can also be pyramid-shaped.
  • a recess 16 is provided on the top 12. This is arranged asymmetrically to the axis 10. Flanks 18, 20 of the recess 16 have a different angle to the axis 10. As a result, a bottom surface 22 of the recess is arranged offset with respect to the circular opening 24 of the recess (FIG. 2).
  • a holding projection 26 is also provided on the underside 14 in a rotationally symmetrical manner with respect to the axis 10.
  • the holding projection 26 has a cylindrical outer contour.
  • recess 28 is provided in the retaining projection 26 in the retaining projection 26 in the retaining projection 26 . This serves as an alignment means in order to be able to align the shaped element held in a processing machine with the aid of the holding attachment 26.
  • the alignment of the molded element can also be done by marking or the like. take place so that the recess 28 and possibly also the retaining projection 26 can be omitted.
  • the top side 12 of the molded element preferably has an outer diameter of 6-8 mm.
  • the recess 16 has a diameter of preferably 3-5 mm in the area of the top 12 and the bottom surface 22 of the recess 16 has a diameter of 1.5-3 mm.
  • the shaped element preferably has a diameter of 4.5-6.5 mm.
  • the height of the molded element is preferably 8-10 mm.
  • the depth of the recess 16 is preferably 4-6 mm.
  • the recess 16 is symmetrical to the axis of rotation 10.
  • the recess 16 is thus frustoconical, the bottom surface 22 also being concentric to the axis of rotation 10.
  • the circles visible in the top view in FIG. 2 are thus concentric.
  • the dimensions of this embodiment of the molded element are preferably also in the ranges specified above.
  • the outer diameter of the upper side 12 is preferably 9-11 mm and the opening 24 of the upper side 12 is preferably 6-8 mm.
  • the bottom surface 22 is preferably 5-7 mm and the underside 7.5-10 mm.
  • the height of the molded element and the depth of the recess are preferably in the same ranges specified above.
  • a further preferred embodiment (FIG. 3) is also a standard shaped element for producing a crown. This form element is already much closer to the final state of the crown than that in the figures. 1 and 2 standard form element shown. However, the shaped element shown in FIG.
  • the shaped element 3 is also a fully sintered pre-shaped shaped element that has not yet been processed to produce the final state of the denture.
  • the shaped element is also essentially frustoconical and has a recess 30.
  • webs 32, 34 are provided, whereby the part of the molded element which forms the crown is connected to a plate 36. After machining the upper part of the molded element, ie the crown, it is separated from the webs 32, 34.
  • Such an arrangement of a molded element is advantageous for processing, for example with the aid of a copying machine.
  • a holding projection 38 corresponding to the holding projection shown in FIG. 1 is provided on the underside of the plate 36.
  • the holding projection 38 is also cylindrical.
  • a bore 40 which runs perpendicular to the longitudinal direction of the retaining projection 38, is provided in the retaining projection 38 and serves as an alignment means for aligning the molding element in the processing machine.
  • the entire shaped element shown in FIG. 3 consists of fully sintered ceramic.
  • the shaped element is preferably produced in one piece by injection molding.

Landscapes

  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Prosthetics (AREA)

Abstract

L'invention concerne un procédé de production d'une prothèse dentaire consistant à préparer, dans une première étape, un élément profilé préformé en céramique. Celui-ci est ensuite complètement fritté. L'élément profilé préformé complètement fritté est travaillé dans l'étape suivante, en vue d'obtenir l'état final de la prothèse. L'utilisation d'éléments profilés préformés en céramique est avantageuse en ce sens que le façonnage de l'élément profilé en vue d'obtenir son état final se fait en enlevant une quantité relativement faible de céramique. Il devient dès lors possible de préparer comme élément profilé préformé, des éléments profilés entièrement frittés de haute dureté.
PCT/EP2002/008737 2001-10-13 2002-08-06 Procede et element profile pour la production d'une prothese dentaire WO2003032861A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10150647.3 2001-10-13
DE2001150647 DE10150647A1 (de) 2001-10-13 2001-10-13 Verfahren und Formelement zur Herstellung von Zahnersatz

Publications (1)

Publication Number Publication Date
WO2003032861A1 true WO2003032861A1 (fr) 2003-04-24

Family

ID=7702439

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/008737 WO2003032861A1 (fr) 2001-10-13 2002-08-06 Procede et element profile pour la production d'une prothese dentaire

Country Status (2)

Country Link
DE (1) DE10150647A1 (fr)
WO (1) WO2003032861A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2692311A1 (fr) * 2012-08-03 2014-02-05 3M Innovative Properties Company Ébauche dentaire comprenant un matériau de zircone préfritté poreux, son procédé de fabrication et article dentaire formé de cette ébauche
EP3199124A1 (fr) * 2016-01-29 2017-08-02 Amann Girrbach AG Procede de fabrication d'un objet dentaire

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005001600B4 (de) * 2004-11-30 2011-08-18 FOLLOW ME! Technology Systems GmbH, 81675 Verfahren zur Material abtragenden Bearbeitung von Werkstücken und Werkstück bzw. Formelement
DE102005063549B4 (de) * 2004-11-30 2015-03-05 Follow Me! Technology Systems Gmbh Werkstück bzw. Formelement, Verfahren zur Material abtragenden Bearbeitung von Werkstücken, Maschinensteuerungsprogramm und Bearbeitungsvorrichtung
DE102010061116B4 (de) * 2010-12-08 2022-01-13 Helge Arndt Verfahren zur Herstellung von dentalen Werkstücken
KR101980933B1 (ko) * 2012-02-29 2019-05-21 이보클라 비바덴트 아게 치아 보철물을 제조하기 위한 블랭크
US11045291B2 (en) 2015-08-03 2021-06-29 James R. Glidewell Dental Ceramics, Inc. Dental restoration preform and method of making the same
DE102018123318A1 (de) * 2018-09-21 2020-03-26 Kulzer Gmbh Vorprodukt zur Herstellung von Prothesenzähnen und Verfahren zu dessen Herstellung und Verarbeitung
DE102019106143A1 (de) * 2019-03-11 2020-09-17 Kulzer Gmbh Rohling zur Herstellung einer dentalen Restauration und Verfahren zu dessen Herstellung

Citations (4)

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Publication number Priority date Publication date Assignee Title
GB1051735A (fr) * 1963-05-08
US4615678A (en) * 1984-03-06 1986-10-07 Moermann Werner H Blank from which a dental implant can be machined, and a method of making the blank
DE19612699C1 (de) 1996-03-29 1997-07-03 Siemens Ag Rohling zur Herstellung eines zahntechnischen Formteils
DE19838239A1 (de) * 1998-08-22 2000-03-02 Girrbach Dental Gmbh Preform

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Publication number Priority date Publication date Assignee Title
FR2567017B1 (fr) * 1984-07-09 1988-12-09 Hennequin Jean Pierre Preforme pour l'usinage de protheses dentaires
DE19838329A1 (de) * 1998-08-24 2000-03-09 Bosch Gmbh Robert Vorrichtung und Verfahren zur Erstellung eines Fahrtenbuchs für ein Kraftfahrzeug

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1051735A (fr) * 1963-05-08
US4615678A (en) * 1984-03-06 1986-10-07 Moermann Werner H Blank from which a dental implant can be machined, and a method of making the blank
DE19612699C1 (de) 1996-03-29 1997-07-03 Siemens Ag Rohling zur Herstellung eines zahntechnischen Formteils
DE19838239A1 (de) * 1998-08-22 2000-03-02 Girrbach Dental Gmbh Preform

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2692311A1 (fr) * 2012-08-03 2014-02-05 3M Innovative Properties Company Ébauche dentaire comprenant un matériau de zircone préfritté poreux, son procédé de fabrication et article dentaire formé de cette ébauche
WO2014022643A1 (fr) * 2012-08-03 2014-02-06 3M Innovative Properties Company Ébauche dentaire comprenant un matériau en zircone poreux pré-fritté, son procédé de production, et article dentaire formé à partir de ladite ébauche dentaire
CN104717937A (zh) * 2012-08-03 2015-06-17 3M创新有限公司 包括预烧结多孔氧化锆材料的牙科坯料、其制备方法和由所述牙科坯料形成的牙科制品
CN104717937B (zh) * 2012-08-03 2016-11-09 3M创新有限公司 包括预烧结多孔氧化锆材料的牙科坯料、其制备方法和由所述牙科坯料形成的牙科制品
RU2607951C2 (ru) * 2012-08-03 2017-01-11 3М Инновейтив Пропертиз Компани Стоматологическая заготовка, содержащая предварительно спеченный пористый диоксидциркониевый материал, способ ее изготовления и стоматологическое изделие, сформированное из указанной стоматологической заготовки
US9592105B2 (en) 2012-08-03 2017-03-14 3M Innovative Properties Company Dental blank comprising a pre-sintered porous zirconia material, process of its production and dental article formed from said dental blank
EP3199124A1 (fr) * 2016-01-29 2017-08-02 Amann Girrbach AG Procede de fabrication d'un objet dentaire
WO2017129282A1 (fr) * 2016-01-29 2017-08-03 Amann Girrbach Ag Procédé de fabrication d'un objet dentaire
KR20180108606A (ko) * 2016-01-29 2018-10-04 아만 기르바흐 아게 치과 물체를 제작하기 위한 방법
US11540907B2 (en) 2016-01-29 2023-01-03 Amann Girrbach Ag Method for producing a dental object
KR102637215B1 (ko) 2016-01-29 2024-02-15 아만 기르바흐 아게 치과 물체를 제작하기 위한 방법

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Publication number Publication date
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