先天缺牙 meaning in Chinese

congenital anodontia

These are 1 ) the case of an inversely impacted permanent maxillary incisor secondary to a supernumerary tooth , and 2 ) the case of severe root dilacerations of a horizontally impacted incisor with midline deviation , severe space deficiency and congenital absence of bilateral mandibular lateral incisors
第二个病例是一位十一岁六个月的女孩，他的左上颚正中门牙因为牙根大角度弯曲，造成水平阻生，同时合并有空间丧失，中线不正，严重空间不足及双侧下颚侧门牙先天缺牙等问题。