PROBLEM TO BE SOLVED: To provide a composition for the oral cavity remarkably improving deposition of a mineral on dentinal tubules, effectively constricting and sealing the dentinal tubules, and having excellent relaxing and prophylactic effects on dentine hypersensivity, and a good feeling of use.SOLUTION: The composition for the oral cavity is characterized by comprising (A) hydrolyzed silk, (B) a water-soluble fluorine compound, (C) an alkali metal salt of a water-soluble condensed phosphoric acid selected from among pyrophosphoric acid, tripolyphosphoric acid, hexametaphosphoric acid, and polyphosphoric acid and/or an alkali metal salt of a water-soluble carboxylic acid selected from among acetic acid, lactic acid, malic acid, tartaric acid, malonic acid, and gluconic acid and is characterized in that the content of the ingredient (A) is 0.5-5 mass%, the content of the ingredient (C) is 0.5-3 mass%, and the total content of the ingredient (A) and the ingredient (C) is 1-6 mass%. In the composition for the oral cavity, (A) the hydrolyzed silk has 200-6,000 number-average molecular weight.COPYRIGHT: (C)2009,JPO&INPIT【課題】ミネラルの象牙細管への沈着を飛躍的に向上させることができ、象牙細管が効果的に狭窄・封鎖されて、象牙質知覚過敏の緩和・予防効果に優れ、かつ良好な使用感を有する口腔用組成物を提供する。【解決手段】(A)加水分解シルク、(B)水溶性フッ素化合物、(C)ピロリン酸、トリポリリン酸、ヘキサメタリン酸及びポリリン酸から選ばれる水溶性縮合リン酸のアルカリ金属塩、及び/又は酢酸、乳酸、リンゴ酸、酒石酸、マロン酸及びグルコン酸から選ばれる水溶性カルボン酸のアルカリ金属塩を含有し、(A)成分の含有量が0.5~5質量%、(C)成分の含有量が0.5~3質量%、かつ(A)成分と(C)成分の総含有量が1~6質量%であることを特徴とする口腔用組成物。(A)加水分解シルクが、数平均分子量200~6,000のものである上記の口腔用組成物。【選択図】なし
