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孩子一共多少颗乳牙
更新时间: 2020-11-05 00:00:00  

20颗乳牙。乳牙大约从4-6个月开始萌出,到2-3岁的时候就完全萌出了。这个期间要好好注意孩子的口腔卫生,好好刷牙。5-7岁的时候开始换第1颗牙了,乳牙先从下前牙开始换。

关键词: 孩子 一共 多少

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