患者张×,男,21岁,住院号84464。因左上后牙流脓2个月于1983年9月29日入院。患者于1983年7月份感到左上后牙粘膜处肿痛,在本单位用抗生素无效。8月上旬自感患处有脓液流出,继用抗生素未见好转。因反复流脓2月余,来我院门诊,检查时发现:口远中颊粘膜有一瘘管,作上颌骨 X 线摄片后,门诊 Patient Zhang ×, male, 21 years old, hospital number 84464. Due to the upper left posterior teeth pus 2 months in September 29, 1983 admission. Patients in July 1983 felt the Ministry of the left upper teeth mucosa swelling and pain in this unit with antibiotics ineffective. In early August from the affected area there is pus outflow, following the use of antibiotics did not improve. More than two months due to repeated pus to our hospital, examination revealed: mouth fistula in the buccal mucosa for upper jaw radiography, out-patient