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四周岁孩子长多少牙
更新时间: 2020-11-04 00:00:00  

一般在孩子2岁左右乳牙全部生长出来,乳牙一共有20颗。孩子现在4岁乳牙还未到替换的年龄,现在有20颗牙齿的话是正常的。儿童会在6岁左右开始换牙,12岁左右牙齿全部替换完,可长出28颗恒牙。换牙时乳牙会慢慢的是的脱落,恒牙逐渐长出,要让孩子养成刷漱口的好习惯。

关键词: 周岁 孩子 多少

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