PROBLEM TO BE SOLVED: To provide a dental adhesive composition which has excellent bending toughness and good strength, and is suitable as a mobile tooth-fixing material.SOLUTION: The invention provides a dental adhesive composition which contains a polymerization monomer (A), and the repeated bending test durability of the composition in which the polymerization monomer (A) is polymerized is 3 times or more. The composition contains a filler (B) expressing flexibility. The reaction force of the filler (B) when compressed 10% is 30 MPa or less. Further, the ratio of the solid content which remains without dissolving (residual solid content weight after drying a solvent after immersion/pre-immersion weight) of the filler is 30% by weight or more when being immersed into acetone under conditions of room temperature and 24 hours.COPYRIGHT: (C)2016,JPO&INPIT【課題】曲げ靭性に優れ良好な強度を有し動揺歯固定材として好適な歯科用接着性組成物を提供する。【解決手段】重合性単量体(A)を含む歯科用接着性組成物であり、重合性単量体(A)が重合した組成物の繰り返し曲げ試験耐性が3回以上であることを特徴する歯科用接着性組成物。前記組成物は。柔軟性を発現するフィラー(B)を含む。また、前記フィラー(B)は、10%圧縮した際の反力が30MPa以下である。さらに前記フィラーは室温・24時間の条件にてアセトンに浸漬したとき、溶解せずに残存する固形分の比率(浸漬後溶媒乾燥後の残存固形分重量/浸漬前重量)が30重量%以上である。【選択図】なし
