EP1603482A1 - Procede de fabrication d'une piece fa onnee dentaire - Google Patents

Procede de fabrication d'une piece fa onnee dentaire

Info

Publication number
EP1603482A1
EP1603482A1 EP04722280A EP04722280A EP1603482A1 EP 1603482 A1 EP1603482 A1 EP 1603482A1 EP 04722280 A EP04722280 A EP 04722280A EP 04722280 A EP04722280 A EP 04722280A EP 1603482 A1 EP1603482 A1 EP 1603482A1
Authority
EP
European Patent Office
Prior art keywords
mold
casting
model
offset
molded part
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.)
Withdrawn
Application number
EP04722280A
Other languages
German (de)
English (en)
Inventor
Anton Bodenmiller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kaltenbach and Voigt GmbH
Original Assignee
Kaltenbach and Voigt 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 Kaltenbach and Voigt GmbH filed Critical Kaltenbach and Voigt GmbH
Publication of EP1603482A1 publication Critical patent/EP1603482A1/fr
Withdrawn legal-status Critical Current

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
    • A61C13/0004—Computer-assisted sizing or machining of dental prostheses
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
    • A61K6/84—Preparations for artificial teeth, for filling teeth or for capping teeth comprising metals or alloys
    • A61K6/844—Noble metals
    • 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 present invention relates to a method for producing a dental molded part according to the preamble of claim 1 and claim 20.
  • the present invention relates to a method for producing molded parts made of precious metal or non-ferrous metal alloys that are difficult to machine.
  • prosthetic restorations are made from a wide variety of materials, depending on the indication-aesthetic demands, health consciousness and financial strength of the patients. Due to new manufacturing technologies such as laser welding, electroplating and, last but not least, the advance of dental CAD / CAM systems, in addition to the classic precious metal casting alloys, new biocompatible materials in the form of semi-finished products such as titanium, glass ceramics, high-performance ceramics or plastics can be used today.
  • a method for producing dental moldings from precious metal alloys which at least partially uses the advantages of a CAD / CAM system, is known from US Pat. No. 5,224,049.
  • the mold whose structure comes closest to the molded part to be produced is selected from a series of predetermined casting molds (so-called molds). If there are still deviations from the molded part to be created, the mold is machined until the cavity corresponds to the molded part to be formed. Then it is filled with a hardenable material, for example a precious metal alloy.
  • the present invention is accordingly based on the object of specifying a possibility of including dental molded parts with more complicated structures in a way that is as rationalized as possible.
  • the object is achieved by a method for producing a dental molding according to claim 1 and by a method according to claim 20.
  • the subclaims relate to advantageous developments of the method according to the invention.
  • the method for producing a dental advantage essentially consists of the following four steps: a) creating a model of the molded part to be formed, b) creating a mold with a cavity, the shape of which essentially corresponds to the shape of the model, c ) Creating a casting by filling the mold cavity with a durable material and d) allowing the casting to harden.
  • the model created in step a) is provided with an offset which is taken into account when the mold is created, and after the casting has hardened, it is machined to finally create the dental mold.
  • the thickness of the offset can depend both on the shape of the molded part to be produced and on the hardenable material, and the offset can partially or completely cover the model.
  • the present invention combines or supplements the advantages of classic CAD / CAM technology with classic casting technology in a modified form and in this way enables highly precise, partially automated and economical production of dental prosthetic work from precious metal or Co-Cr-Mo Alloys in the dental or practice laboratory.
  • the manufacture of the mold is simplified, since the use of the offset makes it possible to compensate for more complex structures in the surface of the molded part to be produced, so that the mold can be worked out relatively quickly and easily.
  • processing of the hardening cast part is then still necessary, but there is the advantage that the desired molded part can ultimately be produced with a very high degree of precision.
  • more complicated surface structures for the Molding are created that would otherwise be difficult or impossible to achieve.
  • the mold is produced by fully automatic machining, in particular by milling, turning, drilling and or grinding at least one mold blank.
  • a removal program that takes the desired contours of the mold into account specifies control commands for an ablating machine, the program in particular also being created on the basis of a three-dimensional CAD reconstruction of the model provided with the offset.
  • at least one gating channel is simultaneously machined into the blank, through which the curable material is then subsequently filled.
  • a second idea of the present invention it is provided that after the casting has hardened, it is left unbuilt for final processing, i.e. inserted together with the mold in a tool holder and processed there. This is preferably the same ablating machine that was previously used to create the mold. In this case, since an exact reprositioning of the cast-off part into the machine tool is made possible, a high degree of accuracy is ensured during the final machining of the cast part.
  • a particular advantage of this second inventive concept is that the mold material can simultaneously serve as a milling or grinding support or holding material, so that the processing of very thin and fragile castings is made possible. After the mold material has been partially milled away, it can then be provided that the casting is back-bedded with another supporting material and then the rest of the casting is machined occlusally.
  • the present invention thus creates the possibility of creating dental moldings from precious metal or non-precious metal alloys in a very effective manner, while at the same time ensuring the highest possible accuracy in the production of the molding.
  • FIG. 11 a tabular overview of the method steps of a classic method for producing a dental casting and the method according to the invention.
  • the method according to the invention for producing dental foam parts represents a significant advance in comparison to the classic method for producing gold castings, since many of the work steps which are usually to be carried out can now be carried out automatically or by machine.
  • the classic method for producing a single gold cap is briefly summarized below.
  • a film cap is first deep-drawn, which is then adapted to the previously processed tooth stump. After isolating the tooth stump, the film cap is fixed and then a wax model of the crown to be made is created. This wax model is now varnished and then the casting is prepared, for which the muffle is first prepared, an investment paste is made and the model of the wax crown is finely embedded. After completing the embedding, the muffle is waxed and preheated and finally poured out with the liquid precious metal alloy. After the casting has hardened, it is divested, the casting blank is cleaned and the casting channel is separated.
  • the cast piece created in this way can then be worked out with a handpiece until it takes on the shape of the desired crown cap.
  • This cap is then blasted and cleaned for surface treatment. After cleaning the tooth stump, the cap can then be put on in the final operation.
  • the beginning of the process according to the invention corresponds to the classic manufacturing process, i.e. in the course of the preparatory operations, the tooth is first machined and then, with appropriate checking of the working documents and the models, preparation margins, etc., the tooth stump shown in FIG. Positive model, made of the same.
  • the stump 1 produced by classic impressions and the like is then optically measured three-dimensionally and inserted for this purpose into a corresponding measuring device, as is generally known from CAD / CAM systems.
  • FIG. 3 An essential step of the method according to the first idea according to the invention is shown in FIG. 3, in which the cap 2 is provided with an offset 2a, that is to say an additional layer applied to the cavity and / or occlusal side, as part of the three-dimensional modeling or CAD reconstruction becomes.
  • This offset 2a can depend on the one hand on the structure of the molded part to be produced and on the other hand on the type of material and is typically in the range of approximately 0.5 mm. It can partially or completely cover the model 2.
  • this offset 2a can then be additionally modeled, that is to say provided with additional layers 2b and 2c, so that overall there is an offset shape, generally provided with the reference number 3, which roughly corresponds to the shape of the molded part to be produced, however - partially or on all sides - is surrounded by an additional layer.
  • the additional modeling of offset 2a can be used in particular to make it relatively simple To form surface structure for the offset mold 3, whereby the subsequent manufacture of the mold for carrying out the casting process is facilitated.
  • a mold should then be created, as shown in FIG. 5 and provided with the reference numeral 10, the mold 10 being intended to have a cavity 11 which provides the structure of the offset, which may have been modified Molding corresponds.
  • the mold is produced fully automatically in accordance with the exemplary embodiment shown, an NC program for producing the mold being generated first with the aid of a CAM module and taking into account the model geometry.
  • the CAM module automatically generates the shape division and the appropriate milling program to form the cavity 11.
  • FIGS. 6a and 6b The manufacture of the mold is shown in FIGS. 6a and 6b, with a first mold blank 12 consisting of a suitable material 13 first being inserted into a clamping bridge of an ablating machine, for example a milling, turning, drilling or grinding machine, and with the aid of a corresponding one Tool 5 is machined to form the lower outer surface 14 of the cavity.
  • a second mold blank 15 shown in FIG. 6b is in turn processed with the aid of the tool 5 in such a way that the upper boundary surface 17 of the cavity results.
  • one or two mold blanks are thus machined, preferably milled with 5 axes, so that finally in the assembled state, a cavity is formed, the structure of which corresponds to offset shape 3 shown in FIG. 4. While the milling process is being carried out, an NC program for later machining of the cast part can be generated automatically, which is necessary to obtain the desired crown cap geometry with a suitable cavity and the desired occlusal side.
  • the mold thus formed is then poured out with the noble metal or the Co-Cr-Mo alloy, with the special, millable mold material preheating before casting in accordance with the previously known Procedure is no longer required.
  • the mold 10 consisting of the two halves 12 and 15 can then be reinserted into the clamping bridge 19 of the milling machine (FIG. 7), with the greatest possible accuracy due to the exact repositioning possibilities later processing is enabled.
  • abrasive tool 6 according to the representation in Fig. 8, the cast part 20 is first machined from the top until finally a surface 25 is formed which corresponds in its dimensions and in its structure to the desired crown cap.
  • the offset is removed with the least loss of material, thus creating the dimensionally accurate cavity. It is essential that the outside of the cast part 20 is supported by the remaining mold material 13 or 16, so that even very fine cast parts can be machined without the risk that they will be damaged, in particular break out.
  • the cavity side is then embedded again with an embedding material 22, for example an appropriate milling wax or plastic, and is thus supported, so that the cast part 20 is securely stored and supported even during the final machining process shown in FIG. 10.
  • an embedding material 22 for example an appropriate milling wax or plastic
  • the occlusal side is then milled until finally this side also has a surface structure 26 which corresponds to the desired crown structure.
  • the machined cast part 20 is removed from the machine and detached from the embedding wax or plastic, which e.g. can be done by heating with a hot air dryer. In rare cases, a final minor correction using a dental motor handpiece is required to rework the inside of the cavity.
  • the resulting crown cap is then blasted briefly on the inside and outside of the veneer surface in a blasting device, whereupon the cap can be put on after cleaning the tooth stump and the surgeries removed, and subsequent operations can be carried out.
  • the workflow described illustrates that, in contrast to the classic dental casting process, the main activities of the dental technician are based on the Relocate CAD / CAM workstation as well as on the CNC-controlled - preferably five-axis - milling machine.
  • the majority of the time-consuming manual work is thus eliminated, as is also shown by the comparison in the table in FIG. 11. It becomes clear that a large number of work steps are transferred to the PC or the machine and, in particular, can also run automatically.
  • the remaining manual tasks are mostly such that they can be carried out very quickly.
  • the millable mold is in front.
  • the casting does not have to be preheated for a long time in a controlled thermal process as has been customary up to now and has to be converted into the casting device in the glowing state.
  • the mold material is also easy to mill or grind without major tool wear, it can also serve as a holder for the casting in the clamping bridge after casting the mold.
  • the advantage here is not only that the cast part is supported during the final machining. At the same time, it is ensured that extremely precise reprositioning is made possible. Because of these advantages, a very thin offset can be used and expensive precious metal can be saved.
  • Co-Cr-Mo alloys on the other hand, the low cutting volume reduces tool wear, which in turn enables cost-covering production.

Abstract

L'invention concerne un procédé de fabrication d'une pièce façonnée dentaire, procédé selon lequel une coquille (10) est formée de manière à présenter un espace creux (11) dont la forme correspond sensiblement à la forme d'un modèle (2) de la pièce façonnée et, par remplissage de l'espace creux (11) de la coquille par un matériau durcissable, une pièce moulée (20) est produite et durcie, caractérisé en ce que le modèle (2) présente une zone excentrée (2a, 2b, 2c) dont il est tenu compte lors de l'élaboration de la coquille (2), et en ce qu'après durcissement de la pièce moulée (20), celle-ci est érodée de manière à obtenir la pièce façonnée dentaire.
EP04722280A 2003-03-20 2004-03-22 Procede de fabrication d'une piece fa onnee dentaire Withdrawn EP1603482A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10312428 2003-03-20
DE10312428 2003-03-20
PCT/EP2004/003022 WO2004082512A1 (fr) 2003-03-20 2004-03-22 Procede de fabrication d'une piece façonnee dentaire

Publications (1)

Publication Number Publication Date
EP1603482A1 true EP1603482A1 (fr) 2005-12-14

Family

ID=33015921

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04722280A Withdrawn EP1603482A1 (fr) 2003-03-20 2004-03-22 Procede de fabrication d'une piece fa onnee dentaire

Country Status (6)

Country Link
US (1) US20070034347A1 (fr)
EP (1) EP1603482A1 (fr)
JP (1) JP2006520229A (fr)
CA (1) CA2519538A1 (fr)
DE (1) DE102004013939A1 (fr)
WO (1) WO2004082512A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE555743T1 (de) 2000-11-08 2012-05-15 Straumann Inst Ag (dentale) oberflächenerfassung und erzeugung
DE102005009210A1 (de) * 2005-02-25 2006-08-31 Wolfgang Sokalla Verfahren zur Herstellung von metallischen Dentalrestaurationselementen
US8060236B2 (en) * 2006-10-16 2011-11-15 Jack Keith Hilliard System for producing orthodontic aligners by CNC machining
DE102006061143A1 (de) * 2006-12-22 2008-07-24 Aepsilon Rechteverwaltungs Gmbh Verfahren, computerlesbares Medium und Computer betreffend die Herstellung von Zahnersatzteilen
US8423166B2 (en) 2010-06-25 2013-04-16 Kabushiki Kaisha Shofu Method for calculating grinding portion of pre-grinding denture
AT515938B1 (de) 2014-08-01 2016-01-15 Steger Heinrich Verfahren zum Bearbeiten eines dentalen Rohlings
JP7016328B2 (ja) * 2019-02-02 2022-02-04 株式会社医科歯科ソリューションズ 歯冠補綴物のエッジ部の修正方法
US20220378555A1 (en) * 2021-06-01 2022-12-01 Yao-Tsung Wu All-Zirconium One-piece Dental Implant

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4175953A (en) * 1978-06-29 1979-11-27 Johnson & Johnson Non-precious dental alloy of Co-Ni-Cr containing Si and B
US5224049A (en) * 1990-04-10 1993-06-29 Mushabac David R Method, system and mold assembly for use in preparing a dental prosthesis
US5691905A (en) * 1990-06-11 1997-11-25 Dentsply Research & Development Corp. Prosthetic teeth and mold making and polishing therefor
US5718585A (en) * 1995-09-15 1998-02-17 Dentsply Research & Development Corp. Prosthetic teeth and mold making therefor
JP3121301B2 (ja) * 1997-10-28 2000-12-25 得丸 正博 人工歯製造システム及び方法
EP1088620A1 (fr) * 1998-05-28 2001-04-04 Kabushiki Kaisya Advance Procede et dispositif de fa onnage d'appareil de prothese et bloc pour prothese
JP4291897B2 (ja) * 1998-05-28 2009-07-08 株式会社アドバンス 歯科用補綴物の製造方法
US6821462B2 (en) * 1998-07-10 2004-11-23 Jeneric/Pentron, Inc. Mass production of shells and models for dental restorations produced by solid free-form fabrication methods
JP3621046B2 (ja) * 1999-04-16 2005-02-16 カルテンバッハ ウント ホイクト ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント カンパニー カーゲー セラミックから医療、歯科医療、歯科技術および技術用の部品を製造する方法
JP2004534608A (ja) * 2001-07-13 2004-11-18 デグデント・ゲーエムベーハー 三次元で測定及びデジタル化した陽性モデルに基づく義歯の作成

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004082512A1 *

Also Published As

Publication number Publication date
WO2004082512A1 (fr) 2004-09-30
JP2006520229A (ja) 2006-09-07
DE102004013939A1 (de) 2004-12-09
US20070034347A1 (en) 2007-02-15
CA2519538A1 (fr) 2004-09-30

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