Impaction of the permanent maxillary central incisor is uncommon, and fusion of mandibular lateral incisors and canines is even more rarely seen.
英
美
摘要上颚正中门齿的阻生是少见的,而下颚双侧恒牙的侧门齿与犬齿融合则更少见;
目录
查词历史
英 汉