US20070034347A1 - Method for the production of a dental moulded part - Google Patents

Method for the production of a dental moulded part Download PDF

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Publication number
US20070034347A1
US20070034347A1 US10/549,931 US54993104A US2007034347A1 US 20070034347 A1 US20070034347 A1 US 20070034347A1 US 54993104 A US54993104 A US 54993104A US 2007034347 A1 US2007034347 A1 US 2007034347A1
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United States
Prior art keywords
casting
coquille
production
moulded part
model
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Abandoned
Application number
US10/549,931
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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
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Kaltenbach and Voigt GmbH
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Filing date
Publication date
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Assigned to KALTENBACH & VOIGHT GMBH & CO. KG reassignment KALTENBACH & VOIGHT GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BODENMILLER, ANTON
Publication of US20070034347A1 publication Critical patent/US20070034347A1/en
Abandoned legal-status Critical Current

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    • 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 the production of a dental moulded part in accordance with the preamble of claim 1 or of claim 20 .
  • the present invention relates to a method for the production of moulded parts of noble metal alloys or non-iron metal alloys which are difficult to work.
  • tooth prosthetic provisions are produced of the most varied materials, depending upon indication, aesthetic requirements, health consciousness and financial situation of the patient.
  • new production technologies such as laser welding, galvano-technics and not lastly through the advance of dental CAD/CAM-systems, today there can be put to use, alongside the classical noble metal casting alloys, also new biocompatible materials in the form of semi-finished materials such as titanium, glass ceramics, high performance ceramics or plastics.
  • noble metal casting alloys in the production of fixed or combined (so-called attachments) tooth prostheses, is as before very high. This is the case because noble metal alloys have proved over decades to be very dependable in the mouth of the patient, tolerant in the case of constructional configuration and design faults and, not least, manifest a high biocompatibility.
  • a further advantage of noble metal alloys further consists in that for these moulded parts a proven range of tested and easily workable veneer ceramics are available.
  • a method for the production of dental moulded parts of noble metal alloys which at least partly uses the advantages of a CAD/CAM system, is known from U.S. Pat. No. 5,224,049.
  • a model of the moulded part to be formed has been produced, there is selected from a series of predetermined mould forms (so-called coquilles), that coquille the structure of which comes closest to the moulded part to be produced. If there are still deviations from the moulded part to be produced, the coquille is worked for so long until the hollow space corresponds to the moulded part to be produced. Then, this is filled with material, for example a noble metal alloy, which can be hardened.
  • the present invention thus is based on the object of indicating a possibility of producing also dental moulded parts with complicated structures in as rationalized a manner as possible.
  • the method for the production of a dental advantage consists in substance of the following four steps:
  • the model produced in step a) is provided with an offset, which is taken into account in the production of the coquille, whereby after the hardening of the casting this is worked by material removal in order finally to produce the dental moulded part.
  • the thickness of the offset may thereby depend both on the form of the moulded part to be produced and also on the hardenable material, and the offset may cover the model in part or also completely.
  • the present invention links or supplements the advantages of classical CAD/CAM technology with classical casting technology in a modified form and in this way makes possible a highly precise, partly automated and economical production of the tooth prosthetic workpieces of noble metal alloys or Co—Cr—Mo alloys in a dental or practice laboratory.
  • the production of the coquille is simplified, since through the employment of the offset more complex structures in the surface of the moulded part to be produced can be compensated, so that the coquille can be worked relatively quickly and simply.
  • the coquille is produced by means of fully automatic material removing working, in particular by means of milling, turning, boring, and/or grinding of at least one coquille blank.
  • a material removal program taking into account the desired contours of the coquille gives control commands for a material removal machine, wherein the program is produced in particular also the basis of a three-dimensional CAD reconstruction of the model provided with the offset.
  • the program is produced in particular also the basis of a three-dimensional CAD reconstruction of the model provided with the offset.
  • coquille material can serve at the same time as millable or grindable support or retaining material, so that also the working of very thin and per se fragile castings is possible. After a partial milling away of the coquille material it can then be provided to again embed behind the casting with another support material and then work the remainder of the casting occlusally.
  • FIGS. 1 to 10 the various steps of a preferred exemplary embodiment of the method in accordance with the invention.
  • FIG. 11 a tabular overview of the method steps of the classical method for the production of a dental casting and of the method in accordance with the invention.
  • a foil cap is deep drawn, which is then adapted to the previously worked tooth stump.
  • the foil cap is fixed and then a wax model of the crown to be made is produced.
  • This wax model is now lacquered and then the casting prepared, for which purpose first the muffle is prepared, a bedding mass slurry produced and the model of the wax crown finely embedded.
  • the muffle is waxed out and pre-warmed and finally poured with the liquid noble metal alloy. After hardening of the casting, this is bedded out and the casting blank finish cleaned and the inlet channel separated.
  • the cast piece produced in this manner can be worked with a handpiece until it assumes the form of the desired crown cap.
  • This cap is then, for the purpose of surface treating, blasted and cleaned. After a cleaning of the tooth stump, the cap can then be put in place in the final operation.
  • the beginning of the method in accordance with the invention thereby corresponds to the classical production method, i.e. within the scope of preparatory operations the tooth is first worked and then there is produced with appropriate monitoring of the working documentation, and the model, margins etc., the tooth stump illustrated in FIG. 1 , provided in general with the reference sign 1 , or a positive model of the same.
  • the stump 1 produced by means of classical impressing and the like is then three-dimensionally optically measured and for this purpose an appropriate measurement device put to use, as is generally known from CAD/CAM systems.
  • FIG. 3 A significant step of the method in accordance with the first inventive insight is illustrated in FIG. 3 , in which the cap 2 is provided within the scope of the three dimensional modelling or CAD reconstruction with an offset 2 a, that is an additionally applied layer on the cavity and/or occlusal side.
  • This offset 2 a may depend on the one hand upon the structure on the moulded part to be produced and on the other hand upon the type of material, and typically lies in the range from ca. 0.5 mm. It may partially or completely cover the model 2 .
  • this offset 2 a can then be additionally modelled, i.e. provided with supplementary layers 2 b and 2 c , so that overall there is provided an offset form, generally given the reference sign 3 , which approximately corresponds to the form of the moulded part be produced, but—partially or on all sides—is surrounded with an additional layer.
  • the supplementary modelling of the offset 2 a can be employed in particular to form a relatively simple surface structure for the offset form 3 , through which the subsequent production of the coquille for carrying out the casting method is facilitated.
  • a coquille is thus then to be produced, as it is illustrated in FIG. 5 and provided with the reference sign 10 , wherein the coquille 10 is to have an hollow space 11 which corresponds to the structure of the moulded part provided with the—if appropriate, modified—offset.
  • the production of the coquille is effected, correspondingly to the illustrated exemplary embodiment, fully automatically, wherein initially a NC program for the production of the coquille is generated with the aid of a CAM module and taking into account the model geometry.
  • the CAM module thereby generates automatically the mould division and the suitable milling program in order to form the hollow space 11 .
  • FIGS. 6 a and 6 b The production of the coquille is illustrated in FIGS. 6 a and 6 b, wherein for this purpose initially a first coquille blank 12 , consisting of a suitable material 13 , is placed in a mounting bridge of a material removing machine, for example a milling, turning, boring or grinding machine, and worked for material removal with an appropriate tool 5 , in order to form the lower outer surface 14 of the hollow space.
  • a second coquille blank 15 illustrated in FIG. 6 b, is in turn so worked with the aid of the tool 5 that the upper bounding surface 7 of the hollow space is provided.
  • one or two coquille blanks are thus worked, preferably five-axis milled, so that finally in the assembled condition a hollow space is formed the structure of with corresponds to the offset form 3 illustrated in FIG. 4 .
  • an NC program for the later working of the casting, which is necessary in order to attain the desired crown cap geometry with a suitable cavity and the desired occlusal side.
  • the coquille formed in this way is then filled with the noble metal alloy or the Co—Cr—Mo alloy, whereby as a result of the special, millable coquille material, a pre-heating before the casting corresponding to the manner of procedure known to date is no longer necessary.
  • the coquille 10 consisting of the two halves 12 and 15 , can be again placed in the mounting bridge 19 of the milling machine ( FIG. 7 ), whereby due to the possibilities for precise repositioning, a precision as great as possible is made possible in the later working.
  • the final working of the casting 20 is now effected in turn with the aid of a material removing tool 6 , wherein corresponding to the illustration in FIG. 8 initially the casting 20 is worked from the upper side, until finally a surface 25 arises which in its dimensions and in its structure corresponds to the desired crown cap.
  • a material removing tool 6 wherein corresponding to the illustration in FIG. 8 initially the casting 20 is worked from the upper side, until finally a surface 25 arises which in its dimensions and in its structure corresponds to the desired crown cap.
  • fine trimming the offset is removed, with the slightest material loss, so that a precisely sized cavity is generated. It is significant that here the outer side of the casting 20 is supported by the remaining coquille material 13 or 16 so that also very fine castings can be worked, without there being the danger that these are thereby damaged, in particular break apart.
  • the cavity side is again embedded with a bedding material 22 , for example an appropriate milling wax or plastic, and thus supported, so that the mould part is safely mounted and supported also during the final working process illustrated in FIG. 10 .
  • a bedding material 22 for example an appropriate milling wax or plastic, and thus supported, so that the mould part is safely mounted and supported also during the final working process illustrated in FIG. 10 .
  • the occlusal side is then milled, until finally also this side has a surface structure 26 which corresponds to the desired crown structure.
  • the worked casting 20 is removed from the machine and released from the bedding wax or plastic, which e.g. may be effected by means of heating with the aid of a hot air blower. In rare cases final slight correction is necessary with the aid of a dental motor handpiece in order to work again the inner side of the cavity.
  • the crown cap provided in this way is then briefly blasted inside and outside at the veneer surface in a blasting apparatus, whereafter, after appropriate removal of contaminant particles and the like, with cleaning of the tooth stump, the cap is put in place and the final operations can be carried out.
  • the described work procedure makes clear that in contrast to the classical dental casting method the primary activities of the dental technician are redirected to the CAD/CAM work station and -to the CNC controlled, preferably 5-axis, milling machine. The great part of the complex manual activities are thus avoided, as is also shown by the comparison in the table of FIG. 11 .
  • many working steps are transferred to the PC or the machine and in particular may also run automatically.
  • the remaining manual tasks are mainly such that they can be carried out very quickly.
  • a further advantage is provided in that the millable coquille need not, as was to date usual, be pre-warmed in a controlled thermal process over an extended time, and transferred in the hot condition into the casting apparatus. Since the coquille material is well millable or grindable without great tool wear, after the coquille casting it can at the same time serve as mounting of the cast piece in the mounting bridge.

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dentistry (AREA)
  • Plastic & Reconstructive Surgery (AREA)
  • Dental Prosthetics (AREA)
  • Dental Preparations (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
US10/549,931 2003-03-20 2004-03-22 Method for the production of a dental moulded part Abandoned US20070034347A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10312428.4 2003-03-20
DE10312428 2003-03-20
PCT/EP2004/003022 WO2004082512A1 (de) 2003-03-20 2004-03-22 Verfahren zur herstellung eines zahnärztlichen formteils

Publications (1)

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US20070034347A1 true US20070034347A1 (en) 2007-02-15

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US10/549,931 Abandoned US20070034347A1 (en) 2003-03-20 2004-03-22 Method for the production of a dental moulded part

Country Status (6)

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US (1) US20070034347A1 (ja)
EP (1) EP1603482A1 (ja)
JP (1) JP2006520229A (ja)
CA (1) CA2519538A1 (ja)
DE (1) DE102004013939A1 (ja)
WO (1) WO2004082512A1 (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080153069A1 (en) * 2006-12-22 2008-06-26 Stephan Holzner Method, machine-readable medium and computer concerning the manufacture of dental prostheses
US8026943B2 (en) 2000-11-08 2011-09-27 Institut Straumann Ag Surface mapping and generating devices and methods for surface mapping and surface generation
US20220378555A1 (en) * 2021-06-01 2022-12-01 Yao-Tsung Wu All-Zirconium One-piece Dental Implant

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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

Citations (6)

* 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
US20020064745A1 (en) * 1998-07-10 2002-05-30 Schulman Martin L. Mass production of shells and models for dental restorations produced by solid free-form fabrication methods
US20020125619A1 (en) * 1999-04-16 2002-09-12 Anton Bodenmiller Method for the manufacture of medical, dental-medical, dental-technical and technical parts from ceramics
US6970760B2 (en) * 2001-07-13 2005-11-29 Degudent Gmbh Production of replacement teeth from a three-dimensionally determined and digitized positive model

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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
EP1088620A1 (en) * 1998-05-28 2001-04-04 Kabushiki Kaisya Advance Method and device for machining prosthetic appliance and prosthetic block

Patent Citations (6)

* 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
US20020064745A1 (en) * 1998-07-10 2002-05-30 Schulman Martin L. Mass production of shells and models for dental restorations produced by solid free-form fabrication methods
US20020125619A1 (en) * 1999-04-16 2002-09-12 Anton Bodenmiller Method for the manufacture of medical, dental-medical, dental-technical and technical parts from ceramics
US6970760B2 (en) * 2001-07-13 2005-11-29 Degudent Gmbh Production of replacement teeth from a three-dimensionally determined and digitized positive model

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8026943B2 (en) 2000-11-08 2011-09-27 Institut Straumann Ag Surface mapping and generating devices and methods for surface mapping and surface generation
US8922635B2 (en) 2000-11-08 2014-12-30 Institut Straumann Ag Surface mapping and generating devices and methods for surface mapping and surface generation
US8982201B2 (en) 2000-11-08 2015-03-17 Institut Straumann Ag Surface mapping and generating devices and methods for surface mapping and surface generation
US20080153069A1 (en) * 2006-12-22 2008-06-26 Stephan Holzner Method, machine-readable medium and computer concerning the manufacture of dental prostheses
US20220378555A1 (en) * 2021-06-01 2022-12-01 Yao-Tsung Wu All-Zirconium One-piece Dental Implant

Also Published As

Publication number Publication date
WO2004082512A1 (de) 2004-09-30
CA2519538A1 (en) 2004-09-30
JP2006520229A (ja) 2006-09-07
EP1603482A1 (de) 2005-12-14
DE102004013939A1 (de) 2004-12-09

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AS Assignment

Owner name: KALTENBACH & VOIGHT GMBH & CO. KG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BODENMILLER, ANTON;REEL/FRAME:018220/0485

Effective date: 20051104

STCB Information on status: application discontinuation

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