Patent ID: 9144475
Filing Date: 2015-09-29
Classification: A61C,A61K,C01B,C01P

Abstract:
1. A process of producing a curable composition comprising: an inorganic powder and a polymerizable monomer, wherein the inorganic powder contains a spherical composite powder, the spherical composite powder has a complex of silicon dioxide and at least one of alumina and zirconia, an amorphous part and a crystalline part are mixed in the spherical composite powder, the sphericity of particles in the spherical composite powder is defined as at least 0.95, and a refractive index difference is not more than 0.05 between the spherical composite powder and a cured product obtained by curing only a compound excluded the spherical composite powder, and the process comprises: obtaining the spherical composite powder in a flame fusion method, and obtaining the curable composition by mixing the inorganic powder containing the spherical composite powder with the polymerizable monomer.