上颌前牙埋伏阻生临床常见，表现为前牙缺如并常伴有邻牙扭转、倾斜、中线不齐等。治疗方法为手术开窗暴露埋伏牙面，粘贴托槽或其它附件进行正畸牵引。由于手术出血、唾液、患儿不宜配合等因素，托槽常很难粘贴而影响治疗。为此笔者将带有双曲唇弓的活动矫治器进行了设计改进 Implantation of the maxillary anterior impacted clinical obstruction, the performance of the anterior teeth missing and often accompanied by adjacent tooth torsion, tilt, midline and other missing. Treatment for the exposed window exposed by surgery, orthodontic traction paste brackets or other accessories. Due to surgical bleeding, saliva, children should not cooperate with other factors, brackets often difficult to paste and affect the treatment. To this end, I will be with the double lip bow bowel appliance design improvements