Dental glass powder

Patent metadata

Field	Value
Publication number	US-10646408-B2
Application number	US-201616086769-A
Country	US
Kind code	B2
Filing date	Dec 1, 2016
Priority date	Mar 28, 2016
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

In one aspect of the present invention, a dental glass powder contains zinc, silicon, and fluorine and does not substantially contain aluminum.

First claim

The invention claimed is:

1. A dental glass powder comprising zinc, silicon, and fluorine and not substantially comprising aluminum,
wherein a content of zinc in the glass powder in terms of zinc oxide (ZnO) is greater than or equal to 10% by mass and less than or equal to 60% by mass,
wherein a content of silicon in the glass powder in terms of silicon oxide (SiO 2 ) is greater than or equal to 15% by mass and less than or equal to 50% by mass, and
wherein a content of fluorine (F) in the glass powder is greater than or equal to 1% by mass and less than or equal to 30% by mass.

2. The dental glass powder according to claim 1 , wherein the content of zinc in the glass powder in terms of zinc oxide (ZnO) is greater than or equal to 20% by mass.

3. The dental glass powder according to claim 1 , wherein the content of zinc in the glass powder in terms of zinc oxide (ZnO) is less than or equal to 55% by mass.

4. The dental glass powder according to claim 1 , wherein the content of fluorine (F) in the glass powder is greater than or equal to 3% by mass.

5. The dental glass powder according to claim 1 , wherein the content of fluorine (F) in the glass powder is less than or equal to 20% by mass.

6. The dental glass powder according to claim 1 , wherein the content of silicon in the glass powder in terms of silicon oxide (SiO 2 ) is greater than or equal to 20% by mass and less than or equal to 40% by mass.

7. The dental glass powder according to claim 1 , further comprising:
calcium,
wherein a content of calcium in the glass powder in terms of calcium oxide (CaO) is greater than or equal to 5% and less than or equal to 20% by mass.

8. The dental glass powder according to claim 1 , further comprising:
strontium,
wherein a content of strontium in the glass powder in terms of strontium oxide (SrO) is greater than or equal to 10% by mass and less than or equal to 30% by mass.

9. The dental glass powder according to claim 1 , further comprising:
phosphorus,
wherein a content of phosphorus in the glass powder in terms of phosphorus oxide (V) (P 2 O 5 ) is less than or equal to 5% by mass.

10. The dental glass powder according to claim 1 , further comprising:
lanthanum,
wherein a content of lanthanum in the glass powder in terms of lanthanum oxide (La 2 O 3 ) is greater than or equal to 10% by mass and less than or equal to 40% by mass.

11. The dental glass powder according to claim 1 , further comprising:
sodium,
wherein, a content of sodium in the glass powder in terms of sodium oxide (Na 2 O) is greater than or equal to 1% by mass and less than or equal to 10% by mass.

12. The dental glass powder according to claim 1 , further comprising:
potassium,
wherein a content of potassium in the glass powder in terms of potassium oxide (K 2 O) is preferably greater than or equal to 1% by mass and less than or equal to 5% by mass.

13. The dental glass powder according to claim 1 , further comprising:
calcium or lanthanum.

14. The dental glass powder according to claim 1 , wherein the content of fluorine (F) in the glass powder is less than or equal to 6.8% by mass.

15. The dental glass powder according to claim 1 , further comprising:
strontium,
wherein a content of strontium in the glass powder in terms of strontium oxide (SrO) is less than or equal to 12.4% by mass.

Assignees

• G C Dental Ind Corp

Inventors

• Yoshimitsu Ryosuke
• Tateiwa Satomi
• Akiyama Shigenori
• Yamamoto Katsushi
• Fukushima Syouichi

Classifications

• A61K33/16

  Fluorine compounds · CPC title

• C03C4/0021

  for dental use · CPC title

• A61K6/849 Primary

  comprising inorganic cements · CPC title

• A61K8/022

  Powders; Compacted Powders · CPC title

• C03C3/062

  with less than 40% silica by weight · CPC title