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如果是一般牙膏,刷牙前沾不沾水影响不大;但如果用的是脱敏牙膏,那最好还是别沾水,以免破坏牙膏中的有效成分。有专家证明,脱敏牙膏的成分与普通牙膏不同,会在牙齿表面形成一个修复层,为避免破坏这个有效成分,刷牙前不要把牙刷沾湿,将牙膏挤在干燥的牙刷上刷牙。 twitter.com/DentistLee1/status

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