Process for manufacturing dental prosthetics based on ceramics

• US 5,910,273 A
• Filed: 10/11/1995
• Issued: 06/08/1999
• Est. Priority Date: 11/25/1992
• Status: Expired due to Term

• Current Assignee: Vita Zahnfabrik H. Rauter GMBH & Co.. KG (Rauter Beteiligungsgesellschaft mbH)
• Original Assignee: Vita Zahnfabrik H. Rauter GMBH & Co.. KG (Rauter Beteiligungsgesellschaft mbH)
• Inventors: Datzmann, Gabriele, Thiel, Norbert
• Primary Examiner(s): Fiorilla, Christopher A.
• Application Number:
  US08/540,751
• Time in Patent Office: 1,336 Days
• Field of Search: 264/16, 264/17, 264/19, 264/20, 264/62, 264/67, 264/643
• US Class Current: 264/16
• CPC Class Codes: A61C 13/0003 Making bridge-work, inlays, implants or the like
• CPC Class Codes: A61C 13/0004 Computer-assisted sizing or machining of dental prostheses
• CPC Class Codes: A61C 13/083 Porcelain or ceramic teeth A61C13/081 takes precedence; preparations A61K6/80
• CPC Class Codes: A61C 5/77 Methods or devices for making crowns
• CPC Class Codes: G16H 20/40 relating to mechanical, radiation or invasive therapies, e.g. surgery, laser therapy, dialysis or acupuncture

Abstract

A process for manufacturing dental prosthetics based on ceramics including the following steps:

machine-processing a prefabricated shaped body to form a molded body with the patient'"'"'s situation being considered, said prefabricated shaped body consisting of at least one oxide-ceramic material selected from the group consisting of aluminum oxide, magnesium oxide, zirconium oxide, and titanium oxide and minor amounts of siliceous additives;

compacting the thus obtained molded body; and

optionally jacketing the compacted molded body.

Claims

1. A process for manufacturing a dental prosthetic comprising the steps of:

forming a molded-body precursor of the prosthetic by machine-processing a porosity-sintered molded blank by CAD/CAM methods to accurately fit prepared definition according to data on a patient'"'"'s dental situation, said porosity-sintered molded blank consisting essentially of at least one oxide-ceramic material selected from the group consisting of aluminum oxide, magnesium oxide, zirconium oxide, and titanium oxide and, optionally, a siliceous additive;

compacting the molded-body precursor by glass infiltration to form the prosthetic.

2. The process of claim 1 further comprising the step of either

jacketing the molded-body precursor or

jacketing the prosthetic.

3. The process of claim 2 wherein the data is obtained from dental impressions of the patient.

4. The process according to claim 2 wherein the data is directly registered on-line.

5. The process according to claim 2 wherein the prosthetic is selected from the group consisting of a bridge, a cap, an inlay, an onlay, a veneer, or a part thereof.

6. The method of claim 2 wherein the porosity-sintered molded blank is obtained by a method selected from the group consisting of form-molding and pressing, injection-molding, simultaneous form-molding and pressing, and press-molding a composition comprising a powder of the at least one oxide-ceramic material.

7. The method of claim 2 wherein the porosity-sintered molded blank is obtained by a process comprising the steps of (a) injection-molding a powder of the at least one oxide-ceramic material, optionally combined with a binder followed by removing the binder after injection-molding, to form a green body and (b) porosity-sintering the green body.

8. The method of claim 2 wherein the porosity-sintered molded blank is obtained by a process comprising the steps of (a) dry-pressing granulates of the at least one oxide ceramic material, optionally combined with a binder followed by removal of the binder after dry-pressing, to form a green body and (b) porosity-sintering the green body.

9. The process of claim 1 wherein the data is obtained from dental impressions of the patient.

10. The process according to claim 1 wherein the data is directly registered on-line.

11. The process according to claim 1 wherein the prosthetic is selected from the group consisting of a bridge, a cap, an inlay, an onlay, a veneer, or a part thereof.

13. The method of claim 1 wherein the porosity-sintered molded blank is obtained by a process comprising the steps of (a) injection-molding a powder of the at least one oxide-ceramic material, optionally combined with a binder followed by removing the binder after injection-molding, to form a green body and (b) porosity-sintering the green body.

14. The method of claim 1 wherein the porosity-sintered molded blank is obtained by a process comprising the steps of (a) dry-pressing granulates of the at least one oxide ceramic material, optionally combined with a binder followed by removal of the binder after dry-pressing, to form a green body and (b) porosity-sintering the green body.

12. The method of claim wherein the porosity-sintered molded blank is obtained by a method selected from the group consisting of form-molding and pressing, injection-molding, simultaneous form-molding and pressing, and press-molding a composition comprising a powder of the at least one oxide-ceramic material.