Photocurable composition and dental restoration filling material

A photocurable composition comprising:

• a polymerizable monomer (A);
• a spherical filler (B) having an average particle size in a range of 230 nm to 1,000 nm;
• and a polymerization initiator (C),
• wherein when measurement is made for the photocurable composition in a state of having formed a cured product having a thickness of 1 mm, using a color difference meter, the cured product of the photocurable composition gives out a colored light having a hue (H) of 0RP or greater and less than 10RP, 0R or greater and less than 10R, 0YR or greater and less than 10YR, or 0Y or greater and less than 10Y in the colorimetric values according to the Munsell Color System on a black background,
• wherein the spherical filler (B) is incorporated in a state in which a part or the entirety of the spherical filler (B) constitutes a composite filler with an organic resin matrix, into the composition,
• wherein 90% or more of individual particles constituting the spherical filler (B) are present in a range of 5% greater or less than the average particle size,
• the polymerizable monomer (A) and the spherical filler (B) satisfy requirement (X1) represented by the following Formulas (1) and (2):
• nP<nF (1)
• nF−nP≥0.002 (2);
• wherein nP represents a refractive index at 25° C. of a polymer obtainable by polymerizing the polymerizable monomer (A);
• and nF represents a refractive index at 25° C. of the spherical filler (B),
• the organic resin matrix and the spherical filler (B) satisfy requirement (X2) represented by the following Formula (3):
• nD<nF (3);
• wherein nD represents a refractive index at 25° C. of the organic resin matrix, and
• the polymerization initiator (C) includes a photosensitizing compound (C1), a tertiary amine compound (C2), and a photoacid generator (C3).