The purpose of the present invention is to provide a dental material, and in particular a dental prosthesis, that has excellent hydrophilicity and that has excellent anti-fouling properties and the like. This dental prosthesis has a single-layer film that is obtained by curing a composition that includes: a compound (I) that has at least one hydrophilic group selected from an anionic hydrophilic group and a cationic hydrophilic group, and that has at least one functional group that has a polymerizable carbon-carbon double bond； a compound (II) that has two or more functional groups that have a polymerizable carbon-carbon double bond (provided that there is no anionic hydrophilic group and no cationic hydrophilic group)； and a surfactant (III) that has a hydrophobic part that comprises an organic residue, and that has a hydrophilic part that has an anionic hydrophilic group, a cationic hydrophilic group, or two or more hydroxyl groups (provided that there is no polymerizable carbon-carbon double bond).本發明之目的在於提供一種親水性優異，防污性等優異之牙科材料、尤其是牙科用填補物。本發明之牙科用填補物具有使包含化合物(I)、化合物(II)及界面活性劑(III)之組成物硬化而獲得之單層膜，上述化合物(I)具有選自陰離子性親水基及陽離子性親水基中之至少1個親水基、與具有聚合性碳-碳雙鍵之至少1個官能基，上述化合物(II)具有2個以上之具有聚合性碳-碳雙鍵之官能基(但，均不具有陰離子性親水基及陽離子性親水基)，上述界面活性劑(III)具有包含陰離子性親水基、陽離子性親水基或2個以上之羥基之親水部，及包含有機殘基之疏水部(其中，不具有聚合性碳-碳雙鍵)。
