作者自1982年起用一次完成根管充填法治疗了123只根管感染的牙。123只患牙的颌位分布除上颌第二磨牙外,余均涉及。病种计慢性根尖周炎占90只,其中44只为瘘管型;感染根管19只,临床和X线片都确认根尖周无病变;急性根尖周炎14只,脓肿均已达粘膜下。34只牙有叩痛。本组123只患牙术前均摄牙片,观察根管形态及根尖周组织病变程度,测量根尖孔至颌面或切缘的长度,以供扩大根管和充填参 The author used a root canal filling procedure once since 1982 to treat 123 root canal-infected teeth. In addition to maxillary second molars, there were more than 123 cases of maxillary bit distribution. Chronic apical periodontitis accounting for 90, of which 44 were fistula; infection of the root canal 19, clinical and X-ray films were confirmed apical week no lesions; acute apical period 14, abscess have reached submucosal . 34 teeth have percussion pain. This group of 123 patients with preoperative dental photographs were taken to observe the root canal morphology and periapical tissue lesions, measuring the apical foramen to the maxillofacial or incision length for expansion of root canal and filling parameters