笔者 1993～ 1999年采用了被动式后牙牙合垫加垂直牵引颏兜对 6例骨型前牙开牙合青少年进行了矫治 ,平均治疗时间 11个月 ,取得了较好的疗效 ,报告如下。1　材料和方法1.1　治疗对象 :男 4例 ,女 2例 ,年龄 8～ 12岁。根据临床检查及 X线头影侧位片分析 ,临床诊断为骨型前牙开 The author from 1993 to 1999 using passive posterior occlusion pad plus vertical traction chin pocket on 6 cases of anterior teeth open adduction adolescent correction, the average treatment time of 11 months, and achieved good results, the report is as follows. 1 Materials and Methods 1.1 Therapeutic objects: 4 males and 2 females, aged 8 to 12 years. According to clinical examination and X-ray cephalometric analysis, the clinical diagnosis of anterior open bone