PROBLEM TO BE SOLVED: To provide a dental curable composition excellent in curability and shieldability.SOLUTION: In this dental curable composition containing a polymerizable monomer (A), a photopolymerization initiator (B), and inorganic particles (C) having an average particle size exceeding 70 nm, concerning transparency ΔL shown by formula (1), a difference (ΔL before curing-ΔL after curing) between transparency before curing (ΔL before curing) of the composition and transparency after curing (ΔL after curing) of the composition is ≥10: ΔL=L*W-L*B (1). (In the formula, L*W shows a lightness index L* in the L*a*b* color system measured with a white background, and L*B shows a lightness index L* in the L*a*b* color system measured with a black background).COPYRIGHT: (C)2013,JPO&INPIT【課題】硬化性及び遮蔽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(A)、光重合開始剤(B)、及び平均粒子径が70nmを超える無機粒子(C)を含む歯科用硬化性組成物であって、下記式(1)で表される透明性ΔLに関し、該組成物の硬化前透明性(ΔL硬化前)と該組成物の硬化後透明性(ΔL硬化後)の差(ΔL硬化前-ΔL硬化後)が10以上である歯科用硬化性組成物とする。ΔL=L*W-L*B (1)(式中、L*Wは、白背景で測定されるL*a*b*表色系における明度指数L*を表し、L*Bは、黒背景で測定されるL*a*b*表色系における明度指数L*を表す。)【選択図】なし
