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小孩换牙时间表 如果偏离太多最好注意是否发育出了问题
儿童6-8岁时开始换第一颗恒牙，即中切牙，第一磨牙也慢慢长出；8-9岁时，开始长出侧切牙；10-12岁时双尖牙开始长出，首先会长第一双尖牙；11-12岁时，上下排的尖牙已经逐渐长出；12-13岁时开始长第二磨牙；第三磨牙，即智齿，17岁后开始长出，维持生长的时间会到21岁，因人而
医生科普牙齿口腔那些事儿212/241
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