Curable composition for dentistry

A curable composition for dentistry, comprising

• a polymerizable monomer (A);
• an inorganic filler (B) having an average particle size of 0.1 to 1 μm;
• an organic-inorganic composite filler (C), and
• a polymerization initiator (D),
• the organic-inorganic composite filler (C) comprising organic-inorganic composite aggregate particles having an aggregated structure where inorganic primary particles having an average particle size of 10 to 1,000 nm are bonded together through a resin layer covering at least part of the surface of the inorganic primary particles so as to form a void;
• the organic-inorganic composite filler (C) having pores where a total pore volume of pores having a pore size measured by a nitrogen adsorption method in the range of 1 to 500 nm is 0.01 to 0.30 cm3/g;
• the organic-inorganic composite filler (C) having an average particle size of 10 to 100 μm;
• wherein the organic-inorganic composite filler (C) comprises a curved surface-shaped organic-inorganic composite filler (C1) composed of organic-inorganic composite aggregate particles having a curved surface shape, and an irregular-shaped organic-inorganic composite filler (C2) composed of organic-inorganic composite aggregate particles having an irregular shape which comprises an edge portion, and
• wherein a content ratio {C1/(C1+C2)} of the curved surface-shaped organic-inorganic composite filler (C1) accounting for the entire organic-inorganic composite filler (C) is 0.2 to 0.8, the content ratio being expressed in terms of a ratio of the total number of the curved surface-shaped organic-inorganic composite aggregate particles which have a particle size of 5 μm or more and which constitute the curved surface-shaped organic-inorganic composite filler (C1), accounting for the total number of the organic-inorganic composite aggregate particles having a particle size of 5 μm or more.