PROBLEM TO BE SOLVED: To provide a high-toughness dental curable composition which avoids: a low reaction rate caused by rapid gelation expression as seen in free radical polymerization of vinyl monomers such as (meth)acrylic acid derivative monomers and its resultant network heterogeneity or the like leading to mechanical strength degradation.SOLUTION: A dental curable composition contains functional composite fine particles which have both covalent and hydrogen bonding properties by binding silane coupling agents having a specific acidic group and a specific radical-polymerizable group to the same fine particle selected from among silicon oxide, aluminum oxide, titanium oxide and zirconium oxide.COPYRIGHT: (C)2016,JPO&INPIT【課題】(メタ)アクリル酸誘導体モノマー等のビニルモノマーのフリーラジカル重合で見られるような急速なゲル化発現による低反応率、それに起因するネットワークの不均一性等による機械的強度低下を起こさせない高靭性歯科用硬化性組成物の提供。【解決手段】特定の酸性基と特定のラジカル重合性基を有するシランカップリング剤とを酸化ケイ素、酸化アルミニウム、酸化チタン、酸化ジルコニウムから選ばれる同一微粒子に結合させることで水素結合性と共有結合性とを併せ持つ機能性複合微粒子を含有させた歯科用硬化性組成物。【選択図】なし
