PROBLEM TO BE SOLVED: To solve the following problem: (meth)acrylic acid derivative monomers such as a methyl methacrylate, a triethylene glycol dimethacrylate, and a urethane-based dimethacrylate are generally used in medical/dental curable compositions and in the free radical polymerization (hereafter referred to as radical polymerization) of radical polymerizable monomers such as the (meth)acrylic acid derivative monomers, carbon-carbon double bonds are cleaved into single bonds, thus forming a polymer and being hardened, and the medical/dental curable compositions are added with not only a radical polymerizable monomer but also an inorganic filler to increase the mechanical strength in general, the inorganic filler is surface-treated by a silane coupling agent with a polymerizable group to improved the wettability and the mechanical strength, and an ultrafine silica powder called fumed silica is also added to improve the operability of the medical/dental curable compositions however, the prior art depending only on the inorganic fillers poses a problem that the mechanical strength, durability, and thixotropy of the medical/dental curable compositions are low.SOLUTION: It is found that organic fibers are included in a medical/dental curable composition to thereby provide very high mechanical strength, toughness, thixotropy, and durability for the medical/dental curable composition.COPYRIGHT: (C)2017,JPO&INPIT
