本文报告采用多粘菌素 B 复合药物空管治疗根尖周病67例(70个病牙),共12个月或28个月的观察结果,有效率达80%。本法与其它牙髓病塑化治疗、单一根管治疗以及其它方法相比较,更为可行而价廉。特别是本法可简化治疗步骤,而且在失败后,常规根管治疗仍然可以施行。 This article reports the use of polymyxin B composite drug empty tube in the treatment of apical periodontitis 67 cases (70 diseased teeth), a total of 12 months or 28 months of observation, the effective rate of 80%. This method is more feasible and less costly than other plastic treatment of endodontic diseases, single root canal treatment and other methods. In particular, this law can simplify the treatment steps, and after failure, conventional root canal treatment can still be implemented.