PROBLEM TO BE SOLVED: To provide a composition for oral cavity effectively preventing pain caused by dentin hyperesthesia, by immediately and sufficiently sealing an aperture of a dentinal tubule on the surface of exposed dentin.SOLUTION: A composition for oral cavity contains the following components (A), (B) and (C): (A) a fatty acid having a hydrocarbon group with a carbon number of 12 to 18, (B) a basic amino acid and (C) water, where the molar ratio ((B)/(A)) of the molar concentration of the component (B) in terms of free basic amino acid conversion and the molar concentration of the component (A) in terms of free fatty acid conversion is 1 or more and 37 or less and the pH is 6 to 9.2.COPYRIGHT: (C)2014,JPO&INPIT【課題】露出した象牙質の表面における象牙細管の開口部を即効的かつ充分に封鎖して、象牙質知覚過敏症に起因する痛みを効果的に防止する口腔用組成物に関する。【解決手段】 次の成分(A)、(B)、及び(C):(A)炭素数12~18の炭化水素基を有する脂肪酸(B)塩基性アミノ酸、及び(C)水を含有し、成分(B)の遊離塩基性アミノ酸換算のモル濃度と成分(A)の遊離脂肪酸換算のモル濃度とのモル比((B)/(A))が1以上37以下であり、かつpHが6~9.2である口腔用組成物。【選択図】図1
