Method of producing a dental prosthetic item, and a dental prosthetic item, a component therefor, and a blank therefor

• US 20060257824A1
• Filed: 08/18/2005
• Published: 11/16/2006
• Est. Priority Date: 05/13/2005
• Status: Abandoned Application

• Current Assignee: Sirona Dental Systems GmbH (Sirona Dental Systems Incorporated)
• Original Assignee: Sirona Dental Systems GmbH (Sirona Dental Systems Incorporated)
• Inventors: Schneider, Wilhelm, Pfeiffer, Joachim
• Application Number:
  US11/206,179
• Publication Number:
  US 20060257824A1
• Time in Patent Office: Days
• US Class Current: 433/218
• 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 13/0006 Production methods
• CPC Class Codes: A61C 13/0022 Blanks or green, unfinished dental restoration parts
• CPC Class Codes: A61C 13/083 Porcelain or ceramic teeth A61C13/081 takes precedence; preparations A61K6/80
• CPC Class Codes: A61C 13/09 Composite teeth, e.g. front and back section A61C13/0835, A61C13/1023 take precedence; Multilayer teeth
• CPC Class Codes: A61K 6/818 comprising zirconium oxide
• CPC Class Codes: A61K 6/827 Leucite

Abstract

In the production of a dental prosthetic item, which dental prosthetic item comprises an at least single-membered framework, as a first component, which framework has an exterior surface to be faced by a veneer, veneering is carried out using a separately produced veneer shell, as a further component, which, optionally with the interposition of further components, has a mating surface for attachment thereof to said exterior surface of said framework and is attached to said framework. Furthermore, a dental prosthetic item produced by the aforementioned method, a component for such a dental prosthetic item, and a blank for the fabrication of such a dental prosthetic item are claimed.

Claims

1. A method of producing a dental prosthetic item, wherein said dental prosthetic item comprises an at least single-membered framework, as a first component, which framework has an exterior surface which is to be faced with a veneer, wherein veneering is effected using a separately produced veneer shell, as a further component, which, optionally with interposition of further components, has a mating surface for the attachment thereof to said exterior surface of said framework and is attached to said framework.

2. A method as defined in claim 1, wherein the at least two components are joined by means of a joining material.

3. A method as defined in claim 1, wherein the two components are produced in a CAD/CAM process.

4. A method as defined in claim 1, wherein the two components are of different materials.

5. A method as defined in claim 4, wherein the material of said veneer shell is esthetically optimized and that the material of said framework is optimized for strength.

6. A method as defined in claim 2, wherein said joining material is dyed to achieve a desired optical effect.

7. A method as defined in claim 2, wherein the joining layer exhibits a gap of varying width.

8. A method as defined in claim 2, wherein said joining material used is solder glass, low-melting point ceramics or an organic adhesive.

9. A method as defined in claim 2, wherein said joining material is additionally colored after joining.

10. A method as defined in claim 1, wherein the division of said dental prosthetic item into at least a first and second component is carried out by automatic separation according to specific design algorithms.

11. A method as defined in claim 1, wherein the at least two components are joined by heat treatment.

12. A dental prosthetic item, comprising an at least single-membered framework, as first component, which framework has an exterior surface faced by a veneer, wherein a separately produced veneer shell, as second component, optionally with interposition of further, separately produced components, is provided with a mating surface for the attachment thereof to said framework and is attached to said framework.

13. A dental prosthetic item as defined in claim 12, wherein the at least two components are joined by means of a joining agent.

14. A dental prosthetic item as defined in claim 12, wherein the at least two components are produced in a CAD/CAM process.

15. A dental prosthetic item as defined in claim 12, wherein the at least two components are of different materials.

16. A dental prosthetic item as defined in claim 15, wherein the material of said veneer shell is esthetically optimized and said material of said framework is optimized for strength.

17. A dental prosthetic item as defined in claim 12, wherein said joining material is dyed to achieve a desired visual effect.

18. A dental prosthetic item as defined in claim 13, wherein said joining material is solder glass, low-melting point ceramics or an organic adhesive.

19. A dental prosthetic item as defined in claim 12, wherein the at least two components are joined by heat treatment.

20. A dental prosthetic item as defined in claim 12, wherein between the first and the second components there is disposed at least one intermediate element, as third component, having on one side a mating surface toward said first component and on the other side a mating surface toward said second component.

21. A dental prosthetic item as defined in claim 12, wherein said joining material is designed so as to achieve a desired visual effect.

22. A dental prosthetic item as defined in claim 13, wherein said joining material is disposed in a gap of varying width.

23. A component for fabrication of a dental prosthetic item, which dental prosthetic item comprises an at least single-membered framework, as first component, wherein said component is designed, for veneering said framework, as a separately produced veneer shell, as second component, and, optionally with interposition of further, separately produced components, has a mating surface for attachment thereof to said framework.

24. A component as defined in claim 23, wherein it is produced in a CAD/CAM process.

25. A component as defined in claim 24, wherein it is esthetically optimized.

26. A component as defined in claim 25, wherein the material is suitable for joining by means of solder glass, low-melting point ceramics or an organic adhesive.

27. A component as defined in claim 26, wherein the material is suitable for joining by means of heat treatment.

28. A blank for the fabrication of an at least two-component dental prosthetic item by means of a material-removal machining technique, wherein a first portion of said blank consists of a first material for a first component and a second portion of said blank consists of a second material for a second component.

29. A blank as defined in claim 28, wherein the material used for said first portion is Al₂O₃ or ZrO and the material used for said second portion is feldspar ceramics or a leucite-containing glass ceramic.

30. A blank as defined in claim 28, wherein said portion for the production of said second component has regions of different coloration.