防止食物残渣经唾液,口腔细菌的作用积久而硬化为牙垢.
不知道.俺的牙目前只是每年清洗两次.牙不好的人,多吃生的蔬菜.饭后马上刷牙/用牙线除食物残渣.
本帖于 2015-01-09 16:55:41 时间, 由普通用户 闽姑 编辑
防止食物残渣经唾液,口腔细菌的作用积久而硬化为牙垢.
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