牙外伤在儿童患者中比较常见,发生率为4％～14％,多为上颌前牙。笔者对1996年5月至1997年11月来我科就诊的17例儿童恒前牙冠折的病人采用活髓切断术治疗,效果较好,报告如下。 对象与方法 1.对象 17例患者共19颗患牙,均为儿童恒前牙。男12例、女15例,年龄6～10岁。15例17颗患牙在伤后0.5～24小时内就诊,2例在伤后3天就诊。19颗患牙中上中切牙15颗,上侧切牙4 Tooth injury in children is more common in children, the incidence was 4% to 14%, mostly anterior maxillary anterior. The author of May 1996 to November 1997 to our department for treatment of 17 cases of children with permanent crown of the patients with pulpotomy treatment, the effect is better, the report is as follows. Subjects and methods 1. Subjects 17 patients a total of 19 teeth, both children with permanent teeth. 12 males and 15 females, aged 6 to 10 years old. Fifteen patients with 17 teeth treated within 0.5-24 hours after injury and two patients treated 3 days after injury. 19 teeth on the upper incisor in 15, the upper incisor 4