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

Patent metadata

Field	Value
Publication number	US-2017247295-A1
Application number	US-201715596750-A
Country	US
Kind code	A1
Filing date	May 16, 2017
Priority date	Oct 31, 2014
Publication date	Aug 31, 2017
Grant date	—

Abstract

Provided is a zirconia sintered body that suppresses discoloration due to porcelain. The zirconia sintered body comprises at least one of a coloring agent A: erbium oxide and a coloring agent B: nickel oxide, and a composite oxide of zirconium and vanadium.

First claim

1 - 3 . (canceled)

4 : A zirconia sintered body, comprising:
at least two coloring agents selected from the group consisting of
a coloring agent A: erbium oxide,
a coloring agent B: nickel oxide,
a coloring agent C: a composite oxide of zirconium and vanadium,
a coloring agent D: a mixture of a composite oxide of iron, cobalt and chromium, a composite oxide of zirconium and silicon, silicon dioxide and nickel oxide, and
a coloring agent E: a composite oxide of zirconium, silicon, cobalt and nickel.

5 : The zirconia sintered body according to claim 4 , comprising:
at least one of the coloring agent A, the coloring agent B and the coloring agent C; and at least one of the coloring agent D and the coloring agent E.

6 : The zirconia sintered body according to claim 4 , comprising:
0.005 to 0.02 mass % of the coloring agent C; and 0.06 to 0.08 mass % of the coloring agent E.

7 : The zirconia sintered body according to claim 4 , comprising:
0.07 to 0.09 mass % of the coloring agent C; and 0.05 to 0.2 mass % of the coloring agent D.

8 : The zirconia sintered body according to claim 4 , comprising:
0.007 to 0.06 mass % of the coloring agent B; and 0.01 to 0.06 mass % of the coloring agent D.

9 : The zirconia sintered body according to claim 4 , comprising:
0.01 to 0.04 mass % of the coloring agent A; 0.05 to 0.07 mass % of the coloring agent C; and 0.05 to 0.08 mass % of the coloring agent D.

10 : The zirconia sintered body according to claim 4 , comprising:
0.002 to 0.3 mass % of the coloring agent A; 0.0005 to 0.03 mass % of the coloring agent B; 0.005 to 0.07 mass % of the coloring agent C; and 0.004 to 0.04 mass % of the coloring agent D.

11 - 13 . (canceled)

14 : A composition, comprising:
zirconium oxide, yttrium oxide, and a coloring agent, wherein the coloring agent comprises at least two coloring agents selected from the group consisting of
a coloring agent A: erbium oxide,
a coloring agent B: nickel oxide,
a coloring agent C: a composite oxide of zirconium and vanadium,
a coloring agent D: a mixture of a composite oxide of iron, cobalt and chromium, a composite oxide of zirconium and silicon, silicon dioxide and nickel oxide, and
a coloring agent E: a composite oxide of zirconium, silicon, cobalt and nickel.

15 : The composition according to claim 14 , comprising:
at least one of the coloring agent A, the coloring agent B and the coloring agent C; and at least one of the coloring agent D and the coloring agent E.

16 : The composition according to claim 14 , comprising:
0.02 to 0.03 mass % of the coloring agent C; and 0.06 to 0.08 mass % of the coloring agent E.

17 : The composition according to claim 14 , comprising:
0.07 to 0.09 mass % of the coloring agent C; and 0.08 to 0.12 mass % of the coloring agent D.

18 : The composition according to claim 14 , comprising:
0.007 to 0.06 mass of the coloring agent B; and 0.01 to 0.06 mass % of the coloring agent D.

19 : The composition according to claim 14 , comprising:
0.01 to 0.04 mass % of the coloring agent A; 0.05 to 0.07 mass % of the coloring agent C; and 0.05 to 0.08 mass % of the coloring agent D.

20 : The composition according to claim 14 , comprising:
0.002 to 0.3 mass % of the coloring agent A; 0.0005 to 0.03 mass % of the coloring agent B; 0.005 to 0.07 mass % of the coloring agent C; and 0.004 to 0.04 mass % of the coloring agent D.

21 : A pre-sintered body, produced by firing a composition according to claim 14 at 800° C. to 1200° C.

22 : A zirconia sintered body, produced by firing a composition according to claim 14 at 1300° C. to 1600° C.

23 - 25 . (canceled)

26 : A pre-sintered body, comprising:
zirconium oxide, yttrium oxide, and a coloring agent, wherein the coloring agent comprises at least two coloring agents selected from the group consisting of
a coloring agent A: erbium oxide,
a coloring agent B: nickel oxide,
a coloring agent C: a composite oxide of zirconium and vanadium,
a coloring agent D: a mixture of a composite oxide of iron, cobalt and chromium, a composite oxide of zirconium and silicon, silicon dioxide and nickel oxide, and
a coloring agent E: a composite oxide of zirconium, silicon, cobalt and nickel.

27 : The pre-sintered body according to claim 26 , comprising:
at least one of the coloring agent A, the coloring agent B and the coloring agent C; and at least one of the coloring agent D and the coloring agent E.

28 : The pre-sintered body according to claim 26 , comprising:
0.02 to 0.03 mass % of the coloring agent C; and 0.06 to 0.08 mass % of the coloring agent E.

29 : The pre-sintered body according to claim 26 , comprising:
0.07 to 0.09 mass % of the coloring agent C; and 0.08 to 0.12 mass % of the coloring agent D.

30 : The pre-sintered body according to claim 26 , comprising:
0.007 to 0.06 mass % of the coloring agent B; and 0.01 to 0.06 mass % of the coloring agent D.

31 : The pre-sintered body according to claim 26 , comprising:
0.01 to 0.04 mass % of the coloring agent A; 0.05 to 0.07 mass % of the coloring agent C; and 0.05 to 0.08 mass % of the coloring agent D.

32 : The pre-sintered body according to claim 26 , comprising:
0.002 to 0.3 mass % of the coloring agent A; 0.0005 to 0.03 mass % of the coloring agent B; 0.005 to 0.07 mass % of the coloring agent C; and 0.004 to 0.04 mass % of the coloring agent D.

33 : A zirconia sintered body, produced by firing a pre-sintered body according to claim 26 at 1300° C. to 1600° C.

34 : A dental product, comprising a zirconia sintered body according to claim 4 .

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 of an antimony compound and a cerium compound.

Assignees

• Kuraray Noritake Dental Inc

Inventors

• Ito Yoshihisa
• Matsumoto Atsushi
• Emoto Tomohiro

Classifications

• A61K6/80 Primary

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

• A61K6/78

  Pigments · CPC title

• A61K6/818

  comprising zirconium oxide · CPC title

• A61K6/822

  comprising rare earth metal oxides · CPC title

• C04B2235/3208

  Calcium oxide or oxide-forming salts thereof, e.g. lime · CPC title