目的 :探讨处理上颌窦良性病变的一种较好进路。方法 :采用经犬齿窝进路和扩大自然窦口的方法对双侧上颌窦良性占位性病变进行治疗。结果 :经 3个月至 2年的术后随访 ,无 1例复发 ,自然窦口无闭锁。结论 :采用双进路治疗上颌窦良性占位性病变 ,视野清楚 ,操作方便 ,效果好 ,值得临床推广应用。 Objective: To explore a better approach to the treatment of benign lesions of maxillary sinus. Methods: The benign space-occupying lesions of bilateral maxillary sinus were treated by the approach of canine lumbar intervertebral space and the expansion of natural sinus ostium. Results: After 3 months to 2 years of follow-up, there was no recurrence in 1 case. There was no occlusion in the natural ostium. Conclusion: The double approach is used to treat benign space-occupying lesions of maxillary sinus with clear vision, convenient operation and good effect, which is worthy of clinical application.