Curable composition and cured product for dental use

Patent metadata

Field	Value
Publication number	US-9351815-B2
Application number	US-201113640773-A
Country	US
Kind code	B2
Filing date	Apr 13, 2011
Priority date	Apr 13, 2010
Publication date	May 31, 2016
Grant date	May 31, 2016

Abstract

The present invention provides a curable composition allowing a cured product having high aesthetic quality, strength and durability along with having high surface lubricating property to be formed. The curable composition according to the present invention comprises: an inorganic powder and a polymerizable monomer. The inorganic powder contains a spherical crystallization control powder. The spherical crystallization control powder has a silicon dioxide content in the range of 97 to 100 mass %. An amorphous portion and a crystalline portion are mixed within the spherical crystallization control powder. A refractive index difference is not more than 0.05 between the spherical crystallization control powder and a cured product obtained by curing only constituents other than the spherical crystallization control powder.

First claim

The invention claimed is:

1. A curable composition containing an inorganic powder and a polymerizable monomer,
wherein the inorganic powder contains a spherical crystallization control powder,
the spherical crystallization control powder has a silicon dioxide content of 98.9 mass % or greater but 100 mass % or less,
a non-crystalline portion and a crystalline portion are mixed within the spherical crystallization control powder,
a refractive index difference is 0.05 or less between the spherical crystallization control powder and a cured product obtained by curing only constituents after removal of the spherical crystallization control powder from the curable composition, and
the polymerizable monomer includes at least one of an acrylate monomer and a methacrylate monomer, and the spherical crystallization control powder content is in a range of 55 to 95 mass %.

2. The curable composition according to claim 1 , wherein a refractive index of the spherical crystallization control powder is in a range of 1.48 to 1.60.

3. The curable composition according to claim 1 , wherein a relative background level of the spherical crystallization control powder in an x-ray diffraction spectrum is 3 to 10.

4. The curable composition according to claim 1 , wherein an average particle size of the spherical crystallization control powder is in a range of 0.01 to 50 μm.

5. The curable composition according to claim 1 , wherein the spherical crystallization control powder is obtained by partially crystallizing, through heat treatment, amorphous spherical particles obtained by a flame fusion method.

6. The curable composition according to claim 1 , further containing a polymerization catalyst, wherein the spherical crystallization control powder content is in a range of 5 to 95 mass %.

7. A cured product for dental use obtained by curing the curable composition according to claim 1 .

8. A process for producing a cured product for dental use,
the process comprising:
forming the curable composition as defined in claim 1 to the cured product for treatment of a tooth.

Assignees

• Tsujimoto Masaya
• Sakaguchi Mikio
• Panasonic Healthcare Co Ltd
• Kao Corp

Inventors

• Tsujimoto Masaya
• Sakaguchi Mikio

Classifications

• A61K6/887

  Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• A61K6/77

  Glass · CPC title

• A61K6/836

  Glass · CPC title

• C01B33/12

  Silica; Hydrates thereof, e.g. lepidoic silicic acid · CPC title

• A61C13/087 Primary

  Artificial resin teeth {(A61C13/081 takes precedence; preparations A61K6/80)} · CPC title