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对于第一次治疗失败和不完善的根管治疗,可重新作根管治疗,它的预期目的是为了改善先前的根管预备,完善根管充填。此项研究的目的是为了估价粗大、细小弯曲根管重治疗的效果以及根管大小,根管偏离率和根管走向的变化。
For the first failure of treatment and imperfect root canal therapy, root canal therapy can be reopened, and its intended purpose is to improve the previous root canal preparation, improve root canal filling. The purpose of this study was to evaluate the effect of coarse, small curved root canal therapy and the change of root canal size, root canal deviation and root canal progression.