PROBLEM TO BE SOLVED: To provide a composition capable of manufacturing a molded article with a complicated form easily even by an unskilled person and shortening operation time in manufacturing a dental prosthetic article using a photosetting resin, and a manufacturing method of the molded article.SOLUTION: A dental composition contains a component (1) of organopolysiloxane having a (meth)acryl group, a component (2) of a photoinitiator excited by light with wavelength in a range of 350 to 700 nm, and a component (3) of a filler. The refractive index difference between the component (1) and the component (3) is within 0.1000 and the light permeability after curing is 50% or more. A manufacturing method of a molded article includes the steps of: preparing a concave by using a 1 paste type visible curable silicone composition having light permeability filling a photosetting resin into the concave irradiating light via the silicone composition and curing the photosetting resin.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】光硬化性樹脂を用いた歯科用補綴物の作製で、未熟練者でも容易に複雑な形態の成型物を作製ができ、作業時間の短縮ができる組成物及び成型物の作成方法の提供。【解決手段】成分(1)(メタ)アクリル基を有するオルガノポリシロキサン、成分(2)350~700nmの範囲の波長光で励起する光重合開始剤、成分(3)充填材を含み、成分(1)と成分(3)の屈折率差が0.1000以内であり、且つ、硬化後の光透過性が50%以上である歯科用組成物。光透過性を有する1ペースト型の可視光硬化性シリコーン組成物を用いて、予め作製したい形態の凹型を取得しておき、ここに光硬化性樹脂を填入し、シリコーン組成物を介して光照射し、光硬化性樹脂を硬化させる成型物の作成方法。【選択図】なし
