Patent ID: 9320684
Filing Date: 2016-04-26
CPC Classification: A61K

Claim Text:
1. A dental restorative material comprising 10 to 50 mass % of (A) a polymerizable monomer, relative to the total mass of (A), (B) and (C), 5 to 80 mass % of (B) an organic-inorganic composite filler having an average particle diameter of 5.0 to 50 μm, which organic-inorganic composite filler comprises an inorganic fine filler having an average particle diameter of 1 μm or smaller and an organic matrix dispersing the inorganic fine filler therein, and the mass % of (B) is relative to the total mass of (A), (B) and (C), and 10 to 60 mass % of (C) a third component inorganic filler having an average particle diameter of 1.1 to 5.0 μm, and the mass % of (C) is relative to the total mass of (A), (B) and (C), wherein the value [nC−nB] of the difference between the refractive index [nC] of the inorganic filler (C) at 32° C. and the refractive index [nB] of the organic-inorganic composite filler (B) at 32° C. is 0.01 to 0.03, and the absolute value |nA−nC|of the difference between the refractive index [nA] of the cured body of the polymerizable monomer (A) at 32° C. and the refractive index [nC] of the inorganic filler (C) at 32° C. is 0.005 to 0.05, and when cured, a diffusion degree (D) is 10 or larger, said diffusion degree being represented by the formula: wherein I