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为什么每天要刷牙

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为什么每天要刷牙?

每天刷牙可以预防牙病。首先要早、中、晚各刷一次牙;其次是在每次饭后三分钟内刷牙;第三是每次刷牙三分钟。人在晚上的那次刷牙十分重要,因为睡觉时分mi减少,自洁作用减弱,加上致病菌代谢活动增qiang,牙齿更容易受损害。如果有的小朋友中午刷牙有困难,也可以用温开水漱漱口,对清洁口腔也有作用。

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