根管充填质量对根管治疗术远期疗效的影响

目的：从X线影像角度分析根管充填质量对根管治疗远期疗效的影响。方法：选择已行根管治疗2a或2a以上的牙，运用平行投照法对根管治疗牙进行摄片；询问、查阅病史，了解患者年龄、性别、牙病病因及治疗时间；检查目前该牙根尖周状况；用SPSS13．0软件进行χ^2检验。结果：共调查病例215例，根管治疗牙376颗．成功率为54．79％。若以根管计算，共有513个根管，成功率为61．4％。根管充填质量（根充位置和密合度）对根管治疗疗效有显著的影响（P〈0．01），根充距离X线片根尖0．5．2mm时最理想；根充密合者成功率高，尤其是根尖部。性别、年龄和根管充填时间对根管治疗疗效无影响。结论：根管充填质量对根管治疗远期疗效有显著影响。

Effect of quality of root canal obturation on the long-term results of root canal therapy

PURPOSE: The purpose of this study was to analyze the quality of obturation affecting the long-term results of root canal therapy (RCT) by radiographic evaluation. METHODS: Teeth of RCT for 2 or more than 2 years were chosen, and periapical radiographs were taken with paralleling technique. The patients' age, gender, etiology, the time of therapy were recorded. The current apical periodontal status of these endodontically treated teeth were examined and recorded. The data were subjected to univariate and multivariate analysis with SPSS13.0 software package. RESULTS: This study investigated 215 cases with 376 endodontically treated teeth. The success rate was 54.79%. If counted by root canal, there were 513 root canals, the success rate was 61.4%. The quality of obturation including obturation position and obturation density affected significantly the results of root canal therapy (P<0.01). The ideal obturation position for successful treated canals was 0.5-2mm from the radiographic apex. The success rate was higher for a good obturation density, especially in the apical third. No statistically significant differences were found based on gender, age and obturation time. CONCLUSION: The quality of root canal obturation significantly affected the long-term results of root canal therapy. Supported by Science Development Foundation of Shanghai Public Health Bureau (Grant No.044062).