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目的:探讨后牙根管治疗失败的原因及临床对策。方法:对50例第一、第二磨牙根管治疗失败的原因进行临床分析。结果:根管欠充填15例,根尖渗漏26例,根管超充填2例,根管遗漏4例,其它3例。结论:发生根管治疗失败原因:①对牙体解剖知识不熟悉;②预备根管技术掌握不好;③继发龋或补物脱落。临床对策:根管治疗一定要拍摄不同阶段的X线片,掌握好根管预备技术,掌握根管测量仪,手动或机动的根管预备器械及新材料的使用,达到每个治疗步骤精准的目的,才能取得根管治疗成功。
Objective: To investigate the causes of failure of posterior root canal therapy and clinical strategies. Methods: The clinical data of 50 cases of first and second molar root canal failure treatment were analyzed. Results: There were 15 cases of root canal under-filling, 26 cases of root-tip leakage, 2 cases of root canal superfilling, 4 cases of root canal omission, and the other 3 cases. Conclusion: The causes of failed root canal therapy are as follows: ① unfamiliarity with dental anatomy; ② poor mastery of prepared root canal techniques; ③ secondary caries or complement loss. Clinical strategy: root canal therapy must take different stages of X-ray film, master the preparation of root canal technology, control of root canal measuring instrument, manual or motorized root canal preparation equipment and the use of new materials to achieve accurate treatment of each step Purpose, to obtain the success of root canal therapy.