四年内使用鼻窦内窥镜经犬齿窝取出上颌窦内异物 7例 ,其中女 2例 ,男 5例 ,年龄为 34～ 52岁 (平均4 3.6岁 ) ,所有病人均因上颌骨部分缺牙而用骨完整移植 ,其金属固定物错位掉入上颌窦 ,其中 3例于左上颌窦 ,4例于右侧。 5例病人由口腔科医师在常规植入术后放射线检查发现上 Within 4 years, 7 cases of maxillary sinus foreign bodies were removed through the canine fossa using a sinus endoscope. There were 2 males and 5 females, aged from 34 to 52 years (mean, 4 to 3.6 years). All the patients had partial maxillary alveoli The bone was completely transplanted and its metal fixture was dislocated into the maxillary sinus, of which 3 were in the left maxillary sinus and 4 in the right. Five patients were found by the dentist on routine radiography