PROBLEM TO BE SOLVED: To obtain a dental curable composition capable of achieving recovery with remarkably high color tone adaptability to a natural tooth and excellent in operability and low in polymerization shrinkage and having high flexural strength of a cured body and excellent in surface gloss and anti-abrassiveness.SOLUTION: This dental curable composition is produced by mixing a polymerizable monomer composition with an organic-inorganic composite filler having a particle mean diameter of 10-20 &mum and has diffusion degree D of &ge0.01 defined by the following formula in a cured body. D=[(I20/cos 20°)+(I70/cos 70°C)]/(2×I0) (wherein, I0, I20, and I70 indicate each optical strength of light transmitted at angles of 0°, 20°, and 70° with respect to the incident direction of light when light is vertically radiated to the surface of a sheet sample with a thickness of 0.3 mm obtained by curing of the dental curable composition).COPYRIGHT: (C)2002,JPO【課題】 天然歯に対する色調適合性が非常に良好な修復を可能とし、かつ操作性に優れ、重合収縮が小さく、硬化体の曲げ強度が高く、表面滑沢性や耐磨耗性に優れた歯科用硬化性組成物を提供する。【解決手段】 重合性単量体組成物、及び平均粒径が1~20μmである有機無機複合フィラーを混合してなる歯科用硬化性組成物であって、硬化体の下記式D={(I20/cos20゜)+(I70/cos70゜)}/(2×I0)(式中、Io、I20、及びI70は、前記歯科用硬化性組成物を硬化させて得た厚さ0.3mmの板状試料に、該試料の表面に対して垂直に光を照射した場合において、光の入射方向に対してそれぞれ、0゜、20゜、及び70゜の方向に透過した光強度を意味する。)で定義される拡散度Dが0.01以上である歯科用硬化性組成物。
