Zirconia composition, zirconia pre-sintered body and zirconia sintered body, and dental product

Patent metadata

Field	Value
Publication number	US-10273189-B2
Application number	US-201515522965-A
Country	US
Kind code	B2
Filing date	Oct 30, 2015
Priority date	Oct 31, 2014
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

A zirconia sintered body that suppresses discoloration due to porcelain. The zirconia sintered body contains at least one of a coloring agent A, which is erbium oxide and a coloring agent B, which is nickel oxide, and contains a composite oxide of zirconium and vanadium. A composition, containing zirconium oxide, yttrium oxide, and a coloring agent, where the coloring agent contains at least one of a coloring agent A, which is erbium oxide and a coloring agent B, which is nickel oxide, and contains a coloring agent C, which is a composite oxide of zirconium and vanadium.

First claim

The invention claimed is:

1. A zirconia sintered body, comprising:
a coloring agent B: nickel oxide; and
a coloring agent C: a composite oxide of zirconium and vanadium.

2. The zirconia sintered body according to claim 1 , further comprising:
a coloring agent A: erbium oxide,
wherein
the coloring agent A is contained in an amount of 0.002 to 0.4 mass %;
the coloring agent B is contained in an amount of 0.0002 to 0.03 mass %; and
the coloring agent C is contained in an amount of 0.005 to 0.1 mass %.

3. The zirconia sintered body according to claim 1 ,
wherein
the coloring agent B is contained in an amount of 0.01 to 0.02 mass %; and
the coloring agent C is contained in an amount of 0.06 to 0.08 mass %.

4. A composition, comprising:
zirconium oxide;
yttrium oxide; and
a coloring agent,
wherein the coloring agent comprises
a coloring agent B: nickel oxide, and
a coloring agent C: a composite oxide of zirconium and vanadium.

5. The composition according to claim 4 , further comprising:
a coloring agent A: erbium oxide,
wherein
the coloring agent A is contained in an amount of 0.002 to 0.5 mass %;
the coloring agent B is contained in an amount of 0.0002 to 0.03 mass %; and
the coloring agent C is contained in an amount of 0.005 to 0.1 mass %.

6. The composition according to claim 4 ,
wherein
the coloring agent B is contained in an amount of 0.01 to 0.02 mass %; and
the coloring agent C is contained in an amount of 0.06 to 0.08 mass %.

7. A pre-sintered body, produced by firing a composition according to claim 4 at 800° C. to 1200° C.

8. A zirconia sintered body, produced by firing a composition according to claim 4 at 1300° C. to 1600° C.

9. A pre-sintered body, comprising:
zirconium oxide;
yttrium oxide; and
a coloring agent,
wherein the coloring agent comprises
a coloring agent B: nickel oxide, and
a coloring agent C: a composite oxide of zirconium and vanadium.

10. The pre-sintered body according to claim 9 , further comprising:
a coloring agent A: erbium oxide,
wherein
the coloring agent A is contained in an amount of 0.002 to 0.4 mass %;
the coloring agent B is contained in an amount of 0.0002 to 0.03 mass %; and
the coloring agent C is contained in an amount of 0.005 to 0.1 mass %.

11. The pre-sintered body according to claim 9 ,
wherein
the coloring agent B is contained in an amount of 0.01 to 0.02 mass %; and
the coloring agent C is contained in an amount of 0.06 to 0.08 mass %.

12. A zirconia sintered body, produced by firing a pre-sintered body according to claim 9 at 1300° C. to 1600° C.

13. A dental product, comprising a zirconia sintered body according to claim 1 .

14. The dental product according to claim 13 , further comprising:
a porcelain layer laminated on the zirconia sintered body,
wherein the porcelain layer comprises an anti-yellowing material.

15. The dental product according to claim 14 , wherein the anti-yellowing material comprises at least one selected from the group consisting of an antimony compound and a cerium compound.

Assignees

• Kuraray Noritake Dental Inc

Inventors

• Ito Yoshihisa
• Matsumoto Atsushi
• Emoto Tomohiro

Classifications

• A61K6/818

  comprising zirconium oxide · CPC title

• A61K6/822

  comprising rare earth metal oxides · CPC title

• A61K6/78

  Pigments · CPC title

• A61K6/80 Primary

  Preparations for artificial teeth, for filling teeth or for capping teeth · CPC title

• C04B35/486

  Fine ceramics · CPC title