PROBLEM TO BE SOLVED: To provide a self-adhesive composite resin having excellent adhesiveness to dentine and mechanical strength and small polymerization contraction force.SOLUTION: The self-adhesive dental composite resin includes (A) 5-30 pts.wt. of a polymerizable monomer having an acidic group, (B) 1-30 pts.wt. of a long-chain polyfunctional polymerizable monomer having a structure expressed by general formula (I) and (C) 40-94 pts.wt. of a polymerizable monomer free from an acidic group and having a structure other than general formula (I) in 100 pts.wt. of total polymerizable monomers, and further contains (D) 100-900 pts.wt. of a filler based on 100 pts.wt. of the polymerizable monomers, and (E) a polymerization initiator. In the formula, R1, R2, R3 and R4 are each the same or different hydrogen atom or methyl m and n are each an average addition molar number of oxyalkylene group m+n is 20-40 and R5 is either one of bivalent groups expressed by formula (A).COPYRIGHT: (C)2012,JPO&INPIT【課題】歯質との接着性と機械的強度に優れ、且つ重合収縮力が小さい自己接着性コンポジットレジンを提供する。【解決手段】重合性単量体の全量100重量部の内、酸性基を有する重合性単量体(A)を5~30重量部と、下記一般式(I)で表される構造を有する長鎖多官能重合性単量体(B)を1~30重量部と、酸性基を有さず且つ下記一般式(I)以外の構造を有する重合性単量体(C)を40~94重量部含み、重合性単量体100重量部に対してフィラー(D)を100~900重量部と、重合開始剤(E)とを含む自己接着性歯科用コンポジットレジンとする。(式中の各記号は明細書中に定義の通りである。)【化1】【選択図】なし
