Dental cement

Patent metadata

Field	Value
Publication number	US-10646410-B2
Application number	US-201616086801-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 cement contains a glass powder, wherein the glass powder contains zinc, silicon, and fluorine and does not substantially contain aluminum.

First claim

The invention claimed is:

1. A dental cement comprising:
a glass powder,
wherein the glass powder contains zinc, silicon, and fluorine and does not substantially contain 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 cement 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 cement 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 cement 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 cement 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 cement 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 cement 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 cement 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 cement 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 ) in the glass powder is less than or equal to 5% by mass.

10. The dental cement 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 cement 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 cement 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 cement according to claim 1 , further comprising:
calcium or lanthanum.

14. The dental cement 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 cement 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

• C03C2217/285

  Fluorides · CPC title

• C04B28/28

  containing organic polyacids, e.g. polycarboxylate cements {, i.e. ionomeric systems} · CPC title

• A61K6/30

  Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives · CPC title

• A61K6/20

  Protective coatings for natural or artificial teeth, e.g. sealings, dye coatings or varnish · CPC title

• C03C4/0021

  for dental use · CPC title