Dental curable composition containing particles with different refractive indexes

Patent metadata

Field	Value
Publication number	US-9511005-B2
Application number	US-201414224191-A
Country	US
Kind code	B2
Filing date	Mar 25, 2014
Priority date	Sep 30, 2013
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

A single-paste, self-adhesive dental curable composition that has strong self-adhesion to biological hard tissues (such as enamel and dentin of teeth) and good color tone adaptability suitable for use for aesthetic restoration is provided. A dental curable composition contains: an inorganic particle (A) with an average grain size in the range of 0.1 to 50 μm; an inorganic particle (B) with an average grain size in the range of 0.1 to 50 μm; a polymerizable monomer (C); and a polymerization catalyst (D). The refractive index na of the inorganic particle (A) and the refractive index nb of the inorganic particle (B) meet the relationship of na>nb. A cured resin material (E), which is obtained by curing a polymerizable composition containing the polymerizable monomer (C) and the polymerization catalyst (D), has a refractive index ne that meets the relationship (1):

0≦| na−ne |<0.01≦ ne−nb ≦0.05  (1).

First claim

What is claimed is:

1. A dental curable composition comprising:
an inorganic particle (A) with an average grain size in the range of 0.1 to 50 μm;
an inorganic particle (B) with an average grain size in the range of 0.1 to 50 μm;
a polymerizable monomer (C); and
a polymerization catalyst (D),

wherein:
the refractive index na of the inorganic particle (A) and the refractive index nb of the inorganic particle (B) meet the relationship of na>nb;
the polymerizable monomer (C) contains an acidic group-containing polymerizable monomer (F1) having a phosphonate group and a non-acidic group-containing polymerizable monomer (G) by a weight ratio of F1:G=3:97 to 50:50;
a cured resin material (E), which is obtained by curing a polymerizable composition containing the polymerizable monomer (C) containing the acidic group-containing polymerizable monomer (F1) having a phosphonate group and the polymerization catalyst (D), has a refractive index ne that meets the relationship (1):
0≦| na−ne|< 0.01≦ ne−nb≦ 0.05  (1);

the acidic group-containing polymerizable monomer (F1) having a phosphonate group is (6-methacryloxy)hexylphosphonoacetate; and
the polymerization catalyst (D) is a photopolymerization initiator.

2. The dental curable composition according to claim 1 , wherein the non-acidic group-containing polymerizable monomer (G) contains a hydrophilic polymerizable monomer (H).

3. The dental curable composition according to claim 2 , wherein the hydrophilic polymerizable monomer (H) accounts for 5 to 70% by weight of the total of the non-acidic group-containing polymerizable monomer (G).

4. The dental curable composition according to claim 1 , wherein the polymerizable monomer (C) further contains an acidic group-containing polymerizable monomer (F2) having acidic groups other than a phosphonate group.

Assignees

• Shofu Inc

Inventors

• Nakatsuka Toshiyuki
• Shinno Kazuya
• Fujiwara Satoshi
• Hara Daisuke

Classifications

• A61K6/887 Primary

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

• A61K6/16

  Refractive index · CPC title

• A61K6/77

  Glass · CPC title

• A61K6/70 Primary

  comprising inorganic additives · CPC title

• A61K6/17

  Particle size · CPC title