PROBLEM TO BE SOLVED: To provide compositions for altering the color of teeth including tooth-coating compositions.SOLUTION: The tooth-coating composition includes: whiteness-imparting particulate materials including crystalline hydroxyapatite and an acrylate polymer comprising t-butyl acrylate, ethyl acrylate, and methacrylic acid, wherein the acrylate polymer is anionic and hydrophilic, has a weight average molecular weight of 600-10,000,000, and is present in the composition in an amount of 60-99 wt.% of the total compositions.COPYRIGHT: (C)2012,JPO&INPIT【課題】歯のコーティング組成物を含む、歯の色を変更するための組成物の提供。【解決手段】結晶性ヒロドキシアパタイトを含む白色度付与粒子状材料;アクリル酸t-ブチル、アクリル酸エチル、及びメタクリル酸を含むアクリレートポリマーを含み、前記アクリレートポリマーは陰イオン性かつ親水性であり、重量平均分子量600~10,000,000を有し、前記組成物中に、総組成物の60~99重量%の量で存在する、歯のコーティング組成物。【選択図】なし