Dental ceramic coloring solution

Patent metadata

Field	Value
Publication number	US-2024059620-A1
Application number	US-202118029724-A
Country	US
Kind code	A1
Filing date	Oct 1, 2021
Priority date	Oct 2, 2020
Publication date	Feb 22, 2024
Grant date	—

Abstract

The present invention provides a dental ceramic coloring solution with which the pink shade needed for dental use can be imparted while reducing a decrease in the strength of a dental ceramic. The present invention relates to a coloring solution for coloring a dental ceramic, comprising a coloring component and a solvent, wherein the coloring component comprises an Er component and a Co component.

First claim

1 . A coloring solution for coloring a dental ceramic, comprising a coloring component and a solvent, wherein the coloring component comprises an Er component and a Co component.

2 . The coloring solution according to claim 1 , wherein a dental ceramic after coloring with the coloring solution and sintering has an a* of 4.5 to 15.0, and a b* of −5.0 to 10 in (L*,a*,b*) according to L*a*b* color system.

3 . The coloring solution according to claim 2 , wherein L* in (L*,a*,b*) according to L*a*b* color system is 65 to 95.

4 . The coloring solution according to claim 1 , wherein the coloring component further comprises an Al component.

5 . The coloring solution according to claim 1 , wherein the Er component and/or the Co component is an ion or a complex.

6 . The coloring solution according to claim 1 , wherein the Er component is a component derived from at least one selected from the group consisting of erbium chloride hydrate, erbium perchlorate hydrate, erbium nitrate hydrate, erbium oxalate hydrate, and erbium acetate hydrate.

7 . (canceled)

8 . The coloring solution according to claim 1 , wherein the Co component is a component derived from at least one selected from the group consisting of cobalt(II) chloride hydrate, cobalt(II) perchlorate hydrate, cobalt(II) fluoride hydrate, cobalt(II) nitrate hydrate, cobalt(II) oxalate hydrate, and cobalt(II) acetate hydrate.

9 . The coloring solution according to claim 1 , wherein the content of the Er component is 110 to 310 mmol/L in terms of an Er ion.

10 . The coloring solution according to claim 1 , wherein the content of the Co component is 0.0340 to 1.70 mmol/L in terms of a Co ion.

11 . The coloring solution according to claim 1 , wherein the solvent comprises water and/or an organic solvent.

12 . The coloring solution according to claim 11 , wherein the organic solvent comprises at least one selected from the group consisting of an alcohol, a glycol, a triol, and a ketone.

13 . The coloring solution according to claim 1 , wherein the dental ceramic comprises zirconia as a main component.

14 . The coloring solution according to claim 13 , wherein the dental ceramic further comprises yttria.

15 . The coloring solution according to claim 14 , wherein the content of the yttria is 1.5 to 10 mol % relative to a total mole of the zirconia and the yttria.

16 . A dental ceramic supporting an Er component and a Co component on a surface of the dental ceramic.

17 . The dental ceramic according to claim 16 , which additionally supports an Al component on a surface of the dental ceramic.

18 . The dental ceramic according to claim 16 , wherein the Er component and/or the Co component is an ion or a complex.

19 . (canceled)

20 . The dental ceramic according to claim 16 , wherein the dental ceramic comprises zirconia as a main component.

21 . The dental ceramic according to claim 20 , wherein the dental ceramic further comprises yttria.

22 . The dental ceramic according to claim 21 , wherein the content of the yttria is 1.5 to 10 mol % relative to a total mole of the zirconia and the yttria.

Assignees

• Kuraray Noritake Dental Inc

Inventors

• Sakamoto Hiroyuki
• Kashiki Nobusuke
• Kato Shinichiro

Classifications

• C04B41/5012 Primary

  chlorides · CPC title

• C04B35/48

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

• C04B41/46

  with organic materials · CPC title

• C04B41/85

  with inorganic materials · CPC title

• A61K6/818

  comprising zirconium oxide · CPC title