关键词: 瘘管, 牙根, 鼻, 诊断, 外科手术

Abstract: Objective To explore the diagnosis and treatment of apicitis of the maxillary canine complicated with paranasal fistula. Methods The clinical data of 6 patients with apicitis of the eye tooth complicated with paranasal fistula were retrospectively analysed. No abnormality was found in the nasal CT or X-ray images. 4 patients were misdiagnosed as osteomyelitis of the maxilla， infectionus ofsebaceous cyst or basal cell carcinoma. 2 patients underwent dental filming and were finally diagnosed as paranasal fistula. In the operations, all were locally ectomized and sutured, the diseased teeth were pulled out, and the raw surfaces of the root tip were scoraped to clean the focus of infection. Results The prospo-cut of all 6 cases ended up with primary healing, and after 2 to 10 years follow-up, no recurrence was found. Conclusions Paranasal fistula may be caused by odongenic diseases and so stomatological examination is necessary for minimizing the misdiagnosis rate. 

Key words: Fistula, Tooth root, Nose, Diagnosis, Surgical procedures, operative