permanent
... 牙周炎 periodontitis 恒牙 permanent teeth 髓角 pulp horn ...
young permanent teeth ; Immature permanent teeth ; juvenile permanent tooth ; young permanent incisors
prematureeruption of permanent teeth
DMF
恒牙是指人类六岁左右乳牙开始逐渐脱落,第一磨牙首先长出,大部分恒牙在14岁左右出齐。恒牙全部出齐共32个,上、下颌各16个。