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

Patent metadata

Field	Value
Publication number	US-2017334786-A1
Application number	US-201515522965-A
Country	US
Kind code	A1
Filing date	Oct 30, 2015
Priority date	Oct 31, 2014
Publication date	Nov 23, 2017
Grant date	—

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

1 . A zirconia sintered body, comprising:
at least one of
a coloring agent A: erbium oxide, and
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 , comprising:
0.002 to 0.4 mass % of the coloring agent A; 0.0002 to 0.03 mass % of the coloring agent B; and 0.005 to 0.1 mass % of the coloring agent C.

3 . The zirconia sintered body according to claim 1 , comprising:
0.01 to 0.02 mass % of the coloring agent B; 0.06 to 0.08 mass % of the coloring agent C.

4 - 10 . (canceled)

11 . A composition, comprising:
zirconium oxide; yttrium oxide; and
a coloring agent,
wherein the coloring agent comprises
at least one of a coloring agent A: erbium oxide and a coloring agent B: nickel oxide,
and
a coloring agent C: a composite oxide of zirconium and vanadium.

12 . The composition according to claim 11 , comprising:
0.002 to 0.5 mass % of the coloring agent A; 0.0002 to 0.03 mass % of the coloring agent B; and 0.005 to 0.1 mass % of the coloring agent C.

13 . The composition according to claim 11 , comprising:
0.01 to 0.02 mass % of the coloring agent B; and 0.06 to 0.08 mass % of the coloring agent C.

14 - 20 . (canceled)

21 . A pre-sintered body, produced by firing a composition according to claim 11 at 800° C. to 1200° C.

22 . A zirconia sintered body, produced by firing a composition according to claim 11 at 1300° C. to 1600° C.

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

24 . The pre-sintered body according to claim 23 , comprising:
0.002 to 0.4 mass % of the coloring agent A; 0.0002 to 0.03 mass % of the coloring agent B; and 0.005 to 0.1 mass % of the coloring agent C.

25 . The pre-sintered body according to claim 23 , comprising:
0.01 to 0.02 mass % of the coloring agent B; and 0.06 to 0.08 mass % of the coloring agent C.

26 - 32 . (canceled)

33 . A zirconia sintered body, produced by firing a pre-sintered body according to claim 23 at 1300° C. to 1600° C.

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

35 . The dental product according to claim 34 , further comprising:
a porcelain layer laminated on the zirconia sintered body, wherein the porcelain layer comprises an anti-yellowing material.

36 . The dental product according to claim 35 , wherein the anti-yellowing material comprises at least one selected from the group consisting of 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

• A61K6/78

  Pigments · CPC title

• A61K6/822

  comprising rare earth metal oxides · CPC title

• A61K6/80 Primary

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

• C04B35/48 Primary

  based on zirconium or hafnium oxides, zirconates, {zircon} or hafnates · CPC title