1临床资料双胞胎患儿,均为女性,孕1产2,孕35周,于2012-09-20在汕头大学医学院第一附属医院剖宫产出生,出生体重分别为2390 g和2360 g,两个羊膜囊,一个胎盘。出生当天检查口腔时发现两患儿下颌乳牙均已萌出(图1),大女左下颌乳中切牙萌出,小女下颌两侧乳中切牙均萌出,初步具备牙齿的大小与形态,牙冠呈乳白色,切端色素 1 clinical data of twins in children, all female, 1 pregnant 2, pregnant 35 weeks, 2012-09-20 Cesarean section birth in the First Affiliated Hospital of Shantou University School of Medicine, birth weight were 2390 g and 2360 g, Two amniotic sacs, one placenta. On the day of birth, when examining the oral cavity, both children’s mandibular deciduous teeth were found to have erupted (Fig. 1). The main female left mandibular incisor eruption, the female mandibular incisor on both sides of the mandibular eruption, initially with the size and shape of teeth, Was milky white, cut the end of the pigment