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DE20316004U1 - Metallic blank for the production of a denture in a digitally-controlled dental cutting system, has the shape of a flat circular disk which is provided with a peripheral groove and a notch running parallel to its axis - Google Patents

Metallic blank for the production of a denture in a digitally-controlled dental cutting system, has the shape of a flat circular disk which is provided with a peripheral groove and a notch running parallel to its axis Download PDF

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Publication number
DE20316004U1
DE20316004U1 DE20316004U DE20316004U DE20316004U1 DE 20316004 U1 DE20316004 U1 DE 20316004U1 DE 20316004 U DE20316004 U DE 20316004U DE 20316004 U DE20316004 U DE 20316004U DE 20316004 U1 DE20316004 U1 DE 20316004U1
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blank
axis
notch
blank according
shape
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DE20316004U
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German (de)
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BIRGIT STUEHRENBERG DENTALE KOMPETENZ GMBH & C, DE
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STUEHRENBERG BIRGIT
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Priority to DE20316004U priority Critical patent/DE20316004U1/en
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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
    • A61C13/0022—Blanks or green, unfinished dental restoration parts
    • 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
    • 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

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

Abstract

Metallic blank has the shape of a flat circular disk (1) which is provided with a peripheral groove (2) and a notch (3) running parallel to its axis. The groove acts to reproducibly establish the axial position of the disk and the notch acts to reproducibly establish the angle position of the disk with respect to its axis.

Description

Die Erfindung betrifft einen metallischen Rohling für die Herstellung von Zahnersatz in einem digitalgesteuerten Dentalfrässystem.The invention relates to a metallic blank for the Manufacture of dentures in a digitally controlled dental milling system.

Nach dem Stande der Technik ist es bekannt, den Zahnersatz wie z. B. Kronen oder Brücken aus einem gewebeverträglichen Metall herzustellen. Dieses Metall wird auch verblendet mit Keramikmaterial. Aus diesem Grunde sollte das verwendete Metallmaterial Eigenschaften haben, die sich mit den Materialeigenschaften von Dentalkeramik vertragen. Insbesondere sollte das verwendete Metall einen passend abgestimmten Wärmeausdehnungskoeffizienten haben, damit die Dentalkeramik nicht beim Brennen abplatzt.According to the state of the art it is known the dentures such. B. crowns or bridges from a tissue compatible To manufacture metal. This metal is also veneered with ceramic material. Out for this reason, the metal material used should have properties have dealt with the material properties of dental ceramics tolerated. In particular, the metal used should be a suitable one CTE have so that the dental ceramic does not flake off when fired.

Nach dem Stande der Technik ist es üblich, solchen metallischen Zahnersatz zu gießen. Hierzu benötigt man im Zahnlabor entsprechende Schmelzöfen zum Aufschmelzen der hochschmelzenden Metalle und entsprechende Gießanlagen. Zum Vergießen ist es nötig, den gegossenen Zahnersatz vor der Weiterverarbeitung sorgfältig zu reinigen, weil die anhaftenden Oxide und sonstigen vom Gießen stammenden Verunreinigungen die Weiterverarbeitung behindern.In the prior art, it is common to use such pour metallic dentures. Needed for this appropriate melting furnaces in the dental laboratory for melting the high-melting ones Metals and corresponding casting plants. For shedding it is necessary, the cast dentures carefully before further processing clean because the adhering oxides and other from the casting Impurities prevent further processing.

Nach dem Stand der Technik ist es auch bekannt, den metallischen Zahnersatz mit Hilfe von digital gesteuerten Dentalfrässystemen unmittelbar aus metallischen Rohlingen herzustellen. Diese Arbeitsweise ist besonders wirtschaftlich, weil das umständliche Schmelzen und Gießen des Metalls und die Reinigungsarbeiten überflüssig werden. Außerdem hat der aus metallischen Rohlingen gefräste Zahnersatz eine bessere metallurgische Qualität, weil die in dem Rohling vorhandene hohe Homogenität der Zusammensetzung nicht gestört wird, wie dies bisweilen bei im Zahnlabor gegossenen Gußstücken vorkommt. Außerdem ist es beim Fräsen besonders gut möglich, nach eingestellten Parametern individuelle Passungen herzustellen.According to the state of the art it is also known the metallic dentures with the help of digital controlled dental milling systems to be produced directly from metallic blanks. This way of working is particularly economical because the cumbersome melting and casting of the Metal and the cleaning work become unnecessary. Also has the denture milled from metal blanks a better one metallurgical quality because the high homogeneity of the composition present in the blank is not disturbed is how this sometimes happens with castings cast in the dental laboratory. Moreover it is when milling particularly well possible Manufacture individual fits according to the set parameters.

Da für die verschiedenen Einsatzzwecke Zahnersatz aus unterschiedlichen Materialien zum Einsatz kommen, hält man im Dentallabor eine Vielzahl von Rohlingen mit unterschiedlichen Materialeigenschaften vorrätig, die in wechselnder Folge für die Herstellung des jeweils benötigten Zahnersatzes verwendet werden. Dabei ist es aus Gründen der optimalen Materialausnutzung notwendig, daß das digitale Dentalfrässystem jeweils darüber informiert ist, wo in dem jeweils zum Einsatz kommenden Rohling noch Material für den zu fräsenden Zahnersatz vorhanden ist. Hierzu muß jeder Rohling eindeutig wieder erkannt werden und in einer reproduzierbaren Position in das digitale Dentalfrässystem eingespannt werden.As dentures for different purposes made of different materials are used in the Dental laboratory a variety of blanks with different material properties available, which in alternating order for the manufacture of what is needed Dentures are used. It is for the sake of Optimal material utilization necessary that the digital dental milling system each over it is informed of where in the blank used in each case Material for the one to be milled Dentures are present. To do this, each blank must clearly again be recognized and in a reproducible position in the digital Dentalfrässystem be clamped.

Es ist Aufgabe der Erfindung, einen metallischen Rohling der eingangs genannten Art zu schaffen, der reproduzierbar in das digital gesteuerte Dentalfrässystem eingespannt werden kann, ohne daß hierfür aufwendige Messungen oder Einrichtungsarbeiten notwendig sind.It is an object of the invention, one to create metallic blank of the type mentioned, the reproducible in the digitally controlled dental milling system can be clamped without expensive measurements or Setup work is necessary.

Zur Lösung dieser Aufgabe schlägt die Erfindung ausgehend von dem metallischen Rohling der eingangs genannten Art vor, daß der Rohling die Form einer flachen Kreisscheibe hat, die an ihrem Umfang mit mindestens einer umlaufenden Nut und mindestens einer parallel zu ihrer Achse verlaufenden Kerbe versehen ist, wobei die umlaufende Nut zur reproduzierbaren Festlegung der axialen Position der Kreisscheibe und die achsparallele Kerbe zur reproduzierbaren Festlegung der Winkelstellung der Kreisscheibe in Bezug auf ihre Achse dient.The invention proposes to achieve this object based on the metallic blank of the type mentioned before that Blank has the shape of a flat circular disc that is around its circumference with at least one circumferential groove and at least one parallel notch extending to its axis is provided, the circumferential Groove for reproducible determination of the axial position of the circular disc and the axially parallel notch for reproducible definition of the Angular position of the circular disc in relation to its axis is used.

Wie ohne weiteres ersichtlich ist, kann der Rohling gemäß der Erfindung anhand der umlaufenden Nut und der achsparallelen Kerbe genau reproduzierbar in das räumliche Achsenkreuz des digital gesteuerten Dentalfrässystems eingesetzt werden, ohne daß es hierzu aufwendiger Messungen oder Einrichtarbeiten bedarf. Im Datenspeicher des digital gespeicherten Dentalfrässystems werden für jeden Rohling gesondert Daten festgehalten, die es dem System ermöglichen, unter Berücksichtigung der an diesem Rohling in der Vergangenheit vorgenommenen Fräsarbeiten einen für die Herstellung eines neuen Zahnersatzes geeigneten Werkstückbereich herauszusuchen und entsprechend zu bearbeiten. Die bei diesen Fräsarbeiten anfallenden Daten werden wieder im System gespeichert und für eventuelle spätere Fräsarbeiten an diesem Rohling bereitgehalten.As can be easily seen, can the blank according to the invention precisely reproducible based on the circumferential groove and the axially parallel notch into the spatial Axis cross of the digitally controlled dental milling system can be used without that it this requires complex measurements or set-up work. In the data store of the digitally stored dental milling system for each blank separately recorded data that enable the system to considering the milling work carried out on this blank in the past one for the production of a new denture suitable workpiece area search out and edit accordingly. The one with this milling work Accruing data is saved in the system again and for any subsequent milling work kept ready on this blank.

Zweckmäßig weisen sowohl die Nut als auch die Kerbe geneigte Flanken auf, die in Bezug auf Ihre Mittenebene symmetrisch verlaufen. Hierdurch werden die Spannwerkzeuge des Dentalfrässystems automatisch in Richtung auf die jeweilige Mitte der Nut bzw. Kerbe geführt, wodurch eine noch präzisere Einspannung möglich wird.Appropriately point both the groove also the notch sloping flanks on that in relation to your center plane run symmetrically. As a result, the clamping tools of the dental milling system automatically in the direction of the respective center of the groove or notch guided, making an even more precise Clamping possible becomes.

Zweckmäßig besteht der Rohling aus einer Kobalt-Chrom-Molybdänverbindung und hat eine Vickershärte von VC 250 bis 400, insbesondere von VC 260 bis 290. Solche Kobalt-Chrom-Molybdänlegierungen haben ein sehr hohes Elastizitätsmodul, und eine hohe Festigkeit, die mit herkömmlichen, leicht schmelzbaren Metallegierungen, nicht erreichbar sind.The blank expediently consists of a cobalt-chromium-molybdenum compound and has a Vickers hardness from VC 250 to 400, in particular from VC 260 to 290. Such cobalt-chromium-molybdenum alloys have a very high modulus of elasticity, and high strength with conventional, easily meltable Metal alloys, are unreachable.

Besonders vorteilhaft ist, daß das Metall des Rohlings frei von Nickel, Beryllium, Gallium und Indium ist. Diese Elemente sind bekanntlich – auch in sehr geringen Mengen – toxisch und beeinflussen deshalb das umliegende Gewebe und damit die Verankerung des Zahnersatzes ungünstig.It is particularly advantageous that the metal the blank is free of nickel, beryllium, gallium and indium. These elements are known to be toxic - even in very small amounts and therefore influence the surrounding tissue and thus the anchoring of dentures unfavorable.

Ein weiterer wesentlicher Vorteil besteht darin, daß das Metall des Rohlings völlig homogen ist und dementsprechend überall die gleichen Eigenschaften hat.Another major advantage is that Blank completely metal is homogeneous and accordingly everywhere has the same characteristics.

Zur weiteren Verbesserung der Gewebefreundlichkeit kann das Metall des Rohlings bis zu 10% Platin enthalten.To further improve tissue friendliness the metal of the blank can contain up to 10% platinum.

Bei einem Gehalt von bis zu 6% Wolfram wird die Festigkeit des Zahnersatzes noch weiter gesteigert.With a content of up to 6% tungsten the strength of the dentures is increased even further.

Damit jeder Rohling von dem Dentalfrässystem in jedem Einsatzfall richtig und fehlerfrei erkannt werden kann, ist schließlich vorgesehen, daß er mit einer unverlierbaren elektronisch lesbaren Kennzeichnung versehen ist. Diese Kennzeichnung wird mit einem entsprechenden Lesesystem bei jedem Einspannen des Rohlings in das Dentalfrässystem gelesen und erkannt, so daß Verwechselungen unmöglich sind.So that every blank from the dental milling system can be recognized correctly and error-free in every application, is finally provided that he provided with a captive, electronically readable label is. This labeling is done with an appropriate reading system read every time the blank is clamped in the dental milling system and recognized so that confusion impossible are.

Ein Ausführungsbeispiel der Erfindung wird im folgenden näher erläutert. Es zeigen:An embodiment of the invention will be closer in the following explained. Show it:

1: Eine perspektivische Ansicht des Rohlings gemäß der Erfindung; 1 : A perspective view of the blank according to the invention;

2: eine Seitenansicht gemäß der Erfindung; 2 : a side view according to the invention;

3: eine Draufsicht auf den Rohling gemäß der Erfindung; 3 : a plan view of the blank according to the invention;

4: einen Schnitt durch den Rohling gemäß der Erfindung entlang der Linie IV – IV in 3. 4 : a section through the blank according to the invention along the line IV - IV in 3 ,

Der in der Zeichnung dargestellte Rohling besteht aus einer Kobalt-Chrom-Molybdänlegierung mit folgender Analyse:The one shown in the drawing Blank consists of a cobalt-chromium-molybdenum alloy with the following analysis:

  • Co: 65% Cr: 21 % Mo: 5,5% W: 5,5% Pt: 2 %Co: 65% Cr: 21% Mon: 5.5% W: 5.5% Pt: 2%

Sonstige Elemente: z. B. Silizium, Eisen, Mangan: unter 1 % Other elements: e.g. B. silicon, Iron, manganese: less than 1%

Der Rohling hat die Form einer flachen Kreisscheibe 1 mit einer Dicke von 8 mm bis 19 mm und einem Durchmesser von 85 mm.The blank has the shape of a flat circular disc 1 with a thickness of 8 mm to 19 mm and a diameter of 85 mm.

Die Kreisscheibe 1 ist in an ihrem Umfang mit einer umlaufenden Nut 2 versehen. Diese Nut 2 hat geneigt verlaufende Flanken 2a und 2b, die in Bezug auf die Mittenebene der Nut 2 symmetrisch verlaufen.The circular disc 1 is in its circumference with a circumferential groove 2 Mistake. This groove 2 has sloping flanks 2a and 2 B that are related to the center plane of the groove 2 run symmetrically.

Weiterhin ist die Kreisscheibe 3 an ihrem Umfang mit einer parallel zu ihrer Achse verlaufenden Kerbe 3 versehen. Auch diese Kerbe hat geneigt verlaufende Flanken 3a und 3b, die in Bezug auf die Mittenebene der Kerbe 3 symmetrisch verlaufen.Furthermore, the circular disc 3 on its circumference with a notch running parallel to its axis 3 Mistake. This notch also has sloping flanks 3a and 3b that are related to the center plane of the notch 3 run symmetrically.

Wie ohne weiteres ersichtlich ist, kann die räumliche Position der Kreisscheibe 1 in Bezug auf ein zentrales räumliches Achsensystem dadurch festgelegt werden, daß durch ein in die Nut 2 eingreifendes Spannmittel die axiale Position genau und reproduzierbar festgelegt wird und daß durch ein weiteres in die Kerbe eingreifendes Spannmittel die Winkelposition der Kreisscheibe in Bezug auf ihre Achse festgelegt wird. Zusätzlich ist der Rohling an seiner Oberfläche mit einer unverlierbaren, elektronisch lesbaren Kennung 4 versehen, die es dem Dentalfrässystem möglich macht, den jeweils eingespannten Rohling eindeutig zu identifizieren.As can be easily seen, the spatial position of the circular disc 1 in relation to a central spatial axis system can be determined by a in the groove 2 engaging clamping means the axial position is precisely and reproducibly determined and that the angular position of the circular disk is defined with respect to its axis by a further clamping means engaging in the notch. In addition, the blank is on its surface with a captive, electronically readable identifier 4 provided, which makes it possible for the dental milling system to clearly identify the clamped blank.

Auf diese Weise ist es möglich, in einem digital gesteuerten Dentalfrässystem alle dem jeweiligen Rohling zugeordneten Daten zu speichern und bei jedem neuen Fräsvorgang entsprechend zu berücksichtigen.In this way it is possible to a digitally controlled dental milling system all the respective Save data assigned to the blank and with each new milling process to take into account accordingly.

Claims (7)

Metallischer Rohling für die Herstellung von Zahnersatz in einem digitalgesteuerten Dentalfrässystem, dadurch gekennzeichnet, daß der Rohling die Form einer flachen Kreisscheibe (1) hat, die an ihrem Umfang mit mindestens einer umlaufenden Nut (2) und mindestens einer parallel zu ihrer Achse verlaufenden Kerbe (3) versehen ist, wobei die umlaufende Nut (2) zur reproduzierbaren Festlegung der axialen Position der Kreisscheibe (1) und die achsparallele Kerbe zur reproduzierbaren Festlegung der Winkelstellung der Kreisscheibe (1) in Bezug auf ihre Achse dient.Metallic blank for the production of dentures in a digitally controlled dental milling system, characterized in that the blank has the shape of a flat circular disc ( 1 ) that has at least one circumferential groove on its circumference ( 2 ) and at least one notch running parallel to its axis ( 3 ) is provided, the circumferential groove ( 2 ) for reproducible determination of the axial position of the circular disc ( 1 ) and the axially parallel notch for reproducible determination of the angular position of the circular disc ( 1 ) in relation to their axis. Rohling nach Anspruch 1, dadurch gekennzeichnet, daß sowohl die Nut (2) als auch die Kerbe (3) geneigte Flanken (2a, 2b; 3a, 3b) aufweisen, die in Bezug auf ihre Mittenebenen symmetrisch verlaufen.Blank according to claim 1, characterized in that both the groove ( 2 ) as well as the notch ( 3 ) inclined flanks ( 2a . 2 B ; 3a . 3b ) that are symmetrical with respect to their center planes. Rohling nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, daß der aus einer Kobalt-Chrom-Molybdänlegierung besteht und eine Vickershärte von VC 250 bis 400, insbesondere von VC 260 bis 290 hat.Blank according to claims 1 or 2, characterized in that that the made of a cobalt-chrome-molybdenum alloy exists and a Vickers hardness from VC 250 to 400, in particular from VC 260 to 290. Rohling nach Anspruch 3, dadurch gekennzeichnet, daß er frei von Nickel, Beryllium, Gallium und Indium ist.Blank according to claim 3, characterized in that he is free of nickel, beryllium, gallium and indium. Rohling nach Anspruch 4, dadurch gekennzeichnet, daß er bis zu 10% Platin enthält.Blank according to claim 4, characterized in that that he contains up to 10% platinum. Rohling nach Anspruch 4, dadurch gekennzeichnet, daß er bis zu 6% Wolfram enthält.Blank according to claim 4, characterized in that that he contains up to 6% tungsten. Rohling nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß er mit einer unverlierbaren elektronisch lesbaren Kennung versehen ist.Blank according to one of claims 1 to 6, characterized in that that he provided with a captive, electronically readable identifier is.
DE20316004U 2003-10-14 2003-10-14 Metallic blank for the production of a denture in a digitally-controlled dental cutting system, has the shape of a flat circular disk which is provided with a peripheral groove and a notch running parallel to its axis Expired - Lifetime DE20316004U1 (en)

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DE20316004U DE20316004U1 (en) 2003-10-14 2003-10-14 Metallic blank for the production of a denture in a digitally-controlled dental cutting system, has the shape of a flat circular disk which is provided with a peripheral groove and a notch running parallel to its axis

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WO2010094922A1 (en) * 2009-02-19 2010-08-26 Renishaw Plc Billet and corresponding billet holder
DE102006023673B4 (en) * 2006-05-19 2013-07-04 Institut Straumann Ag Milling device for producing dental prostheses
DE102012201744A1 (en) * 2012-02-06 2013-08-08 Wieland Dental + Technik Gmbh & Co. Kg Workpiece system
DE102012102059A1 (en) * 2012-03-12 2013-09-12 Nt-Trading Gmbh & Co. Kg Holding device for abutment blanks, set of holding device and structure to be machined, abutment blank and dental implant analog
EP2692311A1 (en) 2012-08-03 2014-02-05 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
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DE102005035474B4 (en) 2005-07-28 2019-06-13 Institut Straumann Ag Method for producing dental prostheses, computer, computer program and computer-readable medium
DE102006023673B4 (en) * 2006-05-19 2013-07-04 Institut Straumann Ag Milling device for producing dental prostheses
WO2010094922A1 (en) * 2009-02-19 2010-08-26 Renishaw Plc Billet and corresponding billet holder
DE102012201744A1 (en) * 2012-02-06 2013-08-08 Wieland Dental + Technik Gmbh & Co. Kg Workpiece system
DE102012102059A1 (en) * 2012-03-12 2013-09-12 Nt-Trading Gmbh & Co. Kg Holding device for abutment blanks, set of holding device and structure to be machined, abutment blank and dental implant analog
DE102012102059B4 (en) * 2012-03-12 2013-10-17 Nt-Trading Gmbh & Co. Kg Holding device for abutment blanks, set of holding device and structure to be machined, abutment blank and dental implant analog
EP2692311A1 (en) 2012-08-03 2014-02-05 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
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