| 摘要 |
PROBLEM TO BE SOLVED: To provide a tooth acid erosion-preventing agent which contains a diphosphonic acid compound as an active ingredient. SOLUTION: This tooth acid erosion-preventing agent contains the diphosphonic acid compound as an active ingredient, and thereby exhibits the long-lasting effect of excellent tooth acid resistance. Thus, the preventing agent can be provided, which is effective not only for acid erosion limited to special persons such as persons working in work sties where large amounts of acid dusts are contained in air, persons regularly using acidic medicines, or persons into whose oral cavities gastric acids easily flow back, but also for acid erosion also spread among general persons, because customs for drinking carbonated drinks, acidic juices or vitamin C for promoting health are recently spread.
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