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一个人正常长多少牙齿
更新时间: 2020-11-04 00:00:00  

成年人一共有28~32个牙齿。人一生有乳牙(共20个)和恒牙(28~32个)两副牙齿。生后4~10个月乳牙开始萌出,12个月后未萌出者为乳牙萌出延迟。乳牙萌出顺序一般为下颌先于上颌、自前向后,约于2.5岁时乳牙出齐。

关键词: 个人 正常 多少 牙齿

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