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目的 探讨外科手术和正畸前方牵引治疗骨性上颌后缩的可行性。方法一例16岁女性骨性上颌后缩患者，前牙反 。经术前正畸后，先行改良LeFort Ⅰ骨切开术+颏成形术，但不前移上颌骨，而是通过面具进行前方牵引。结果骨性上颌后缩得到明显改善，反 解除，SNA由77.35°矫治到80.25°。结论 改良LeFort Ⅰ骨切开术结合正畸前方牵引是治疗生长发育停止后骨性上颌后缩的的一个有效手段。“,”Objective Distraction osteogenesis is a new method to correct severe craniofacial dysplasia. Thisstudy was to evaluate the effect of surgery with orthodontic distraction in treating skeletal maxillary hyoplasia. MethodOne 16 years old female patient with maxillary hypoplasia, first treated by modified Lefort 1 osteotomy after pre-surgi-cal orthodontics, then distracted the maxilla forward by face mask. Results The anterior crossbite was released. SNAwas correct from 77.35° to 80.25°. Conclusion Modified Lefort I osteotomy combined with orthodontic distraction isan effective alternative in correcting skeletal maxillary hypoplasia.