EP0311214B1
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EP
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A method of making a dental crown for a dental preparation by means of cad-cam system
Assignee: Elephant Edelmetaal BV
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Filing: 1988-10-06
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Granted: 1991-05-02
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Expires: 2008-10-06
Abstract
Abstract A method of making a dental crown (5) for a dental preparation (1) by means of a CAD-CAM system. In said method, first a model of the dental preparation is made from a refractory material under the control of the CAD-CAM system. Subsequently, at least one layer (2) of a material suitable for dental crowns is applied to the model. The layer is sintered during or after its application, and is then ground under the control of the CAD-CAM system until a predetermined shape is obtained. Finally the refractory material is removed.
Inventors
- 👤 Joseph Maria Van Der Zel
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 22:02
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/0003; A61C13/0004; A61C5/00; A61C5/70; A61C5/73; A61C5/77; A61C9/00; A61K; A61K6/00; A61K6/15; A61K6/16; A61K6/17; A61K6/20; A61K6/80; A61K6/802; A61K6/84; A61K6/844; G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/4097; G05B19/4099; G05B2219/00; G05B2219/30; G05B2219/45; G05B2219/45167; G05B2219/49; G05B2219/49013; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49567; Y10T409/00; Y10T409/30; Y10T409/30084; Y10T409/300896
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
84 words
A method of making a dental crown for a dental preparation by means of a CAD-CAM system caractersed in that under the control of the CAD-CAM system a model of the dental preparation is made from a refractory material, to which model successively two or more layers of a material suitable for dental crowns are applied, each layer being sintered during or after its application and being subsequently ground under the control of said CAD-CAM after which the model of refractory material is removed
Claim 2
Independent Claim
84 words
A method of making a dental crown for a dental preparation by means of a CAD-CAM system caractersed in that under the control of the CAD-CAM system a model of the dental preparation is made from a refractory material, to which model successively two or more layers of a material suitable for dental crowns are applied, each layer being sintered during or after its application and being subsequently ground under the control of said CAD-CAM after which the model of refractory material is removed
Claim 3
Dependent Claim
36 words
A method as claimed in claim 1, characterized in that the refractory material is MgO and that the model is cut under the control of the CAD-CAM system to obtain the shape of the dental preparation.
Claim 4
Dependent Claim
54 words
A method as claimed in claim 1, characterized in that four layers are applied to the model of the dental preparation, the first layer being a metal layer of a dental alloy, the second layer an opaque porcelain layer, the third layer a dentin porcelain layer and the fourth layer a cutting mass layer.
Claim 5
Dependent Claim
42 words
A method as claimed in claim 3, characterized in that the dental alloy is made up of a metal powder having a grain size smaller than 60 micrometers and a bulk density larger than 70% of the theoretical density of the alloy.
Claim 6
Independent Claim
24 words
A method as claimed in at least any one of claims 1-4, characterized in that the layers are applied by means of pneumatic spraying.
Claim 7
Independent Claim
22 words
A method as claimed in any one of claims 1-4, characterized in that the layers are applied by means of plasma jetting.
Claim 8
Independent Claim
22 words
A method as claimed in any one of claims 1-4, characterized in that the layers are applied by means of flame spraying.
Claim 9
Independent Claim
22 words
A method as claimed in any one of claims 1-4, characterized in that the layers are applied by means of laser sintering.
References Cited (Backward Citations)
No citation records indexed.
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