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US 7,236,842 B2Granted
System and method for manufacturing a dental prosthesis and a dental prosthesis manufactured thereby
AssigneeCadent Ltd.
InventorsAvi Kopelman, Eldad Taub
Life of this patent
Estimating the term…
Abstract
A dental prosthesis is made by externally machining successive layers of wax, each of which is formed on a previous prosthesis layer and/or on a coping. Each wax layer is used to form a mold in situ over the previous prosthesis layer/coping, and the appropriate prosthesis material is cast or otherwise molded to conform to the wax layer by the mold.
Claims25
A method for manufacturing a dental prosthesis, comprising:
- (a) providing at least one coping adapted for implantation at a dental site, the or each said at least one coping having a corresponding external surface;
- (b) providing a three-dimensional (3D) virtual model of said dental prosthesis comprising at least one virtual internal surface and at least one virtual prosthesis layer having a virtual external surface, the or each said at least one virtual internal surface being substantially complementary to a corresponding said external surface of the or each said coping, respectively;
- (c) generating computerized numerical control (CNC) instructions corresponding to the or each virtual external surface of said 3D model;
- (d) producing a set of wax models in association with said at least one coping, comprising at least one wax model, corresponding to the or each virtual prosthesis layer, each said wax model being produced by means of material removal operations carried out on an external wax surface of a corresponding wax layer provided on said coping or on a prosthesis layer previously formed over said coping, said material removal operations being based on said CNC instructions,
- (e) producing a dental prosthesis on said coping from said set of wax models.
2 more elements
A method for the fabrication of a set of wax models, comprising at least one wax model, to be used for the fabrication of a dental prosthesis of at least one tooth to be fitted over at least one tooth preparation, comprising:
- (a) providing at least one coping adapted for implantation at a dental site, the or each said at least one coping having a corresponding external surface;
- (b) providing a three-dimensional (3D) virtual model of said dental prosthesis comprising at least one virtual internal surface and at least one prosthesis layer having a virtual external surface, the or each said at least one virtual internal surface being substantially complementary to a corresponding said external surface of the or each said coping, respectively;
- (c) generating computerized numerical control (CNC) instructions corresponding to the or each virtual external surface of said 3D model;
- (d) producing a set of wax models in association with said at least one coping, comprising at least one wax model, corresponding to the or each virtual prosthesis layer, each said wax model being produced by means of material removal operations carried out on an external wax surface of a corresponding wax layer provided on said coping or on another prosthesis layer previously formed over said coping, said material removal operations being based on said CNC instructions.
1 more element
A system for manufacturing a dental prosthesis, comprising:
- (a) first fabrication system for providing at least one coping adapted for implantation at a dental site, the or each said at least one coping having a corresponding external surface;
- (b) first computer based system for providing a three-dimensional (3D) virtual model of said dental prosthesis comprising at least one virtual internal surface and at least one prosthesis layer having a virtual external surface, the or each said at least one virtual internal surface being substantially complementary to a corresponding said external surface of the or each said coping, respectively;
- (c) second computer based system for generating computerized numerical control (CNC) instructions corresponding to the or each virtual external surface of said 3D model;
- (d) second fabrication system for producing a set of wax models in association with said at least one coping, comprising at least one wax model, corresponding to the or each virtual prosthesis layer, each said wax model being produced by means of material removal operations carried out on an external wax surface of a corresponding wax layer provided on said coping or on another prosthesis layer previously formed over said coping, said material removal operations being based on said CNC instructions;
- (e) third fabrication system for producing a dental prosthesis on said coping from said set of wax models.
2 more elements
A system for the fabrication of a set of wax models, comprising at least one wax model, to be used for the fabrication of a dental prosthesis of at least one tooth to be fitted over at least one tooth preparation, comprising:
- (a) first fabrication system for providing at least one coping adapted for implantation at a dental site, the or each said at least one coping having a corresponding external surface;
- (b) first computer based system for providing a three-dimensional (3D) virtual model of said dental prosthesis comprising at least one virtual internal surface and at least one prosthesis layer having a virtual external surface, the or each said at least one virtual internal surface being substantially complementary to a corresponding said external surface of the or each said coping, respectively;
- (c) second computer based system for generating computerized numerical control (CNC) instructions corresponding to the or each virtual external surface of to said 3D model;
- (d) second fabrication system for producing a set of wax models in association with said at least one coping, comprising at least one wax model, corresponding to the or each virtual prosthesis layer, each said wax model being produced by means of material removal operations carried out on an external wax surface of a corresponding wax layer provided on said coping or on another prosthesis layer previously formed over said coping, said material removal operations being based on said CNC instructions.
1 more element
Dependencies are inferred from the claim text.