笔者临床上发现 1例 2 1|、| 12分别呈融合状态 ,且 | 12融合牙伴有畸形舌侧尖 ,此现象在临床上较为少见。特报道如下 :　　患者 ,男 ,9岁 ,于 2 0 0 3年 3月 2 0日就诊。主诉右下牙疼不适 5d余。　　检查 :Ⅲ |牙残冠 ,冠向舌侧倾斜 ,根尖暴露刺伤相应的唇侧粘膜 ,残冠处牙龈 The clinical findings of a case of 2 1 |, | 12 were fusion state, and fusion of 12 teeth with lingual tip, this phenomenon is clinically rare. Special report is as follows: Patient, male, 9 years old, on March 20, 2003 treatment. Complained of lower right toothache discomfort more than 5d. Check: Ⅲ | crown teeth, the crown tilted to the lingual tip, the apical exposure stabbed the corresponding labial mucosa, residual crown gums