Gc Corporation

Shinji Kaga

Futoshi Fusejima

Naoko Jimbo

To provide a dental restorative material composition using an organic-inorganic composite filler having excellent surface smoothness like a natural tooth, low polymerization shrinkage, excellent X-ray contrast imaging property, similar transparency to that of a natural tooth, and no variation of transparency before and after the composition is hardened, the dental restorative material composition includes (a) a (meth)acrylate monomer, (b) an organic-inorganic composite filler having an average particle diameter of 5 to 50 &#x3bc;m which is made by mixing a (meth)acrylate monomer and a fine particle filler having an average primary particle diameter of 0.005 to 0.3 &#x3bc;m and having X-ray impermeability, (c) a fine particle filler having an average primary particle diameter of 0.005 to 0.04 &#x3bc;m, and (d) a photopolymerization initiator.

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Itabashi-ku, Japan

Shinji Kaga