| 摘要 |
PROBLEM TO BE SOLVED: To obtain a composition for oral use excellent in stain removing effect. SOLUTION: This composition for oral use contains 0.1-50 mass % of at least one species selected from a group consisting of hydroxyapatite, fluoroapatite, apatite carbonate, calcium tertiary phosphate and calcium octavus phosphate, 0.1-30 mass % of at least one species of polyethylene having 200-20,000 average molecular weight and 0.01-3 mass % of at least one species of polypyrrolidone having 10,000-360,000 average molecular weight.
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