PROBLEM TO BE SOLVED: To provide a temporary sealing material for dental use, the material being used to be filled in a caries removal part during the course of treatment prior to a final repair of a caries part and being configured to absorb water to swell in the oral cavity to stabilize its property to seal the crypt wall.SOLUTION: A temporary sealing material for dental use is a polymerizable composition consisting of a filler and a matrix, in which a polymer obtained by polymerizing the following compositions (1) to (3) absorbs water and swells while being immersed in water: (1) a matrix-forming component including a polymerizable hydrophilic methacrylate monomer and a methacrylate based crosslinking agent (2) a polymer or copolymer of a hydrophilic methacrylate (acrylate) monomer or a polymer or copolymer of a hydrophilic methacrylate (acrylate) monomer containing an inorganic compound and (3) a polymerization catalyst.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】齲蝕部位の最終修復の前の治療経過中における齲蝕除去部位に充填する歯科用仮封材において、口腔内で吸水膨張により窩壁への密封性が安定化する仮封材の提供。【解決手段】フィラーとマトリックスからなる重合性組成物で下記(1)~(3)からなる組成物を重合した重合体が水に浸漬した状態で吸水膨張をおこす歯科用仮封材。(1)重合可能な親水性メタクリレートモノマーおよびメタクリレート系架橋剤を含むマトリックス形成成分、(2)親水性メタクリレート(アクリレート)モノマーの重合体または共重合体、または無機化合物を含む親水性メタクリレート(アクリレート)モノマーの重合体または共重合体、(3)重合触媒【選択図】なし
