近5年来,我们对18例前牙反牙合伴上前牙拥挤患者进行了矫治,取得了良好的效果。现摘其2例报告如下。　　讨论:前牙反牙合伴上前牙拥挤是临床常见的错牙合畸形。以往常常在矫治开始即采用拔除两个上颌第一双尖牙来矫治拥挤,结果造成后期不能完全关闭拔牙间隙或前牙不能建立正常 In the past five years, we have treated 18 crowded anterior crowned patients with anterior teeth anti-obstruction, and achieved good results. Pick the two cases are as follows. Discussion: anterior teeth anti-obstruction with anterior crowded crowding is a common malocclusion. In the past often used at the beginning of correction that is used to remove the two maxillary first bicuspid to correct crowded, resulting in late can not completely close the extraction gap or anterior can not establish normal