PROBLEM TO BE SOLVED: To provide oral compositions containing particles having dentinal tubule sealing properties and having excellent adhesion in dentinal tubules.SOLUTION: Provided is an oral composition containing hydroxyapatite particles, the ratio of the diffraction peak intensity around 2θ=32° with respect to the diffraction peak intensity around 2θ=26° in the X-ray diffraction pattern being 0.8 to 1.5.SELECTED DRAWING: NoneCOPYRIGHT: (C)2020,JPO&INPIT【課題】象牙細管の封鎖性を有し、且つ象牙細管内での固着性に優れた粒子を口腔用組成物すること。【解決手段】Ｘ線回折パターンにおける２θ＝２６°付近の回折ピーク強度に対する２θ＝３２°付近の回折ピーク強度の比が０．８～１．５である、ヒドロキシアパタイト粒子を含有する口腔用組成物。【選択図】なし
