| 摘要 |
PROBLEM TO BE SOLVED: To ameliorate enamel hypoplasia teeth and increase the whiteness of teeth. SOLUTION: A low-crystallinity hydroxyapatite with a Ca/P molar ratio of 1.4-1.8, an average particle size of 0.005-30.0μm is formulated in an amount of 0.001-50 wt.% to prepare the objective oral cavity composition.
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