Grinding blank for dental cutting machining

The problem to be solved by the present invention is that it is difficult to produce a mill for dental cutting without cracks, cracks or the like. The problem can be solved by using a curable composition for a mill blank for dental cutting. A composition containing 14-36 mass% of a bifunctional urethane methacrylate monomer (A) represented by formula 1, 2-12 mass% of a urethane group-free bifunctional methacrylate monomer (B), 60-80 mass% of an inorganic filler (C), 0.1-0.5 mass% of a thermal polymerization initiator (D), and 0.1-0.5 mass% of a chain transfer agent (E), # imgabs 0 # 本发明要解决的课题是难以在没有裂纹或破裂等的状态下制作牙科切削加工用磨坯。通过使用用于牙科切削加工用磨坯的固化性组合物能够解决课题，其特征在于，其包含14～36质量％的由下述式1表示的二官能性氨基甲酸酯甲基丙烯酸酯单体(A)、2～12质量％的不含氨基甲酸酯基的二官能性甲基丙烯酸酯单体(B)、60～80质量％的无机填充剂(C)、0.1～0.5质量％的加热聚合引发剂(D)以及0.1～0.5质量％的链转移剂(E)，#imgabs0#