Conclusion Dental appliance is effective for the conservative treatment of OSAS, especially for those with mandibular retraction and hypo-angle and without himantosis and soft palate flaccid ptosis. 结论口腔矫治器是OSAS保守治疗的有效方法,对于下颌后缩、低角及无悬雍垂过长和软腭松驰下垂的轻中度OSAS,患者效果良好。