本文目的是评价根管治疗后牙根纵折的骨吸收形式以及其与临床症状的关系。 材料与方法 收集1996.6～1998.1临床确诊为牙根纵折而简单拔除的75例根管治疗牙,以及可疑根纵折经手术探查后确诊而拔除的35树根管治疗牙。其中上颌前磨牙66例、下颌前磨牙13例、下颌磨牙近中根31例。临床表现分别记录如下:①慢性炎症:慢性咬合痛,从瘘道或牙周袋骨缺损处溢脓。 The aim of this paper is to evaluate the pattern of bone resorption and its association with clinical symptoms after root canal therapy. MATERIAL AND METHODS: Seventy-five root canal treatment teeth were collected from 1996.6 to 1998.1, which were clinically diagnosed as longitudinal root plugs and simply extracted. Root canal treatment of suspicious root longitudinal folds confirmed by surgical exploration was performed. There were 66 cases of maxillary premolar, 13 cases of mandibular premolar and 31 cases of mandibular molars. Clinical manifestations were recorded as follows: ① chronic inflammation: chronic bite pain, pus from the fistula or periodontal patella defect over pus.