Dental curable composition and composite resin using the same

A dental curable composition comprising:

• a polymerizable monomer (A) having a refractive index of 1.52 to 1.58 after polymerization;
• inorganic particles (B) having a refractive index of 1.43 to 1.50;
• and
• inorganic particles (C) having a refractive index of 1.52 to 1.58,
• wherein the inorganic particles (B) are aggregates of inorganic fine particles having an average primary particle size of 2 to 50 nm, and the content of the inorganic particles (B) is 0.1 to 10% by weight,
• and wherein the inorganic particles (C) comprise:
• non-aggregated inorganic particles (C-I) having an average particle size of 0.1 to 1.0 μm, and
• aggregated inorganic particles (C-II) having an average particle size of 1 to 20 μm and comprising silica-based fine particles having an average particle size of 2 to 50 nm and an oxide comprising at least one heavy metal
• where a weight ratio between the inorganic particles (C-I) and the inorganic particles (C-II) is 1:4 to 4:1.