1病例报告患儿女,因“母孕40周,经阴道分娩娩出15min”于2014年5月4日入院。患儿系第3胎,第1产,出生后哭声响亮,反应可,全身皮肤呈粉红色,1min Apgar评分9分,5min Apgar评分10分。查体:新生儿下颌正中有2颗形态类似下颌乳中切牙的结构组织,大小约0.3cm,松动且与牙龈相连接,无牙根与牙槽骨相连,左侧乳白色,右侧较暗半透明。 1 case of children with children, because “40 weeks pregnant mother, vaginal delivery delivered 15min ” on May 4, 2014 admission. The third fetus in children, the first production, crying loudly after birth, the reaction can be, the whole body was pink skin, Apgar score 1 min 1 min, Apgar score 5 min 5 min. Physical examination: the middle of the newborn mandibular mandibular midrib has 2 similar to the structure of mandibular incisors, the size of about 0.3cm, loose and connected with the gums, no teeth and alveolar bone connected to the left milky white, the right darker half Transparent.