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幼儿有多少颗牙齿
更新时间: 2020-11-05 00:00:00  

幼儿有20颗乳牙,2岁半到6岁之间是乳牙列时期,也就是拥有着20颗乳牙。从6岁开始就会退牙,陆续的退掉这20颗乳牙,一般要退到12-13岁左右。通常情况下,在6岁还会开始萌出后面的大牙,也就是这20颗以外的恒牙,是第6颗恒牙,也叫做六龄齿。

关键词: 幼儿 多少 牙齿

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