根管玷污层的研究进展

Research progress of smear layer of root canal

根管玷污层是指在牙体牙髓病根管治疗时,在使用根管预备器械清理根管及根管成型的过程中,产生并黏附于根管壁并且有一部分深入牙本质小管中的一层污染涂层。根管玷污层对于根管治疗是否成功,以及术后远期效果均具有重要意义。普通冲洗液如生理盐水、蒸馏水等均无法清除玷污层,需使用特殊冲洗液如次氯酸钠溶液等才可去除,现今临床上无论是手用器械还是机用器械进行根管清理、成型后均无可避免地产生了玷污层,但是通过根管预备方法的改进可以减少玷污层的产生。本文从根管玷污层的产生过程、意义及去除措施等方面综述根管玷污层的研究进展。

Smear layer of root canal refers to a polluted layer which is generated and adhered to the root canal wall, and even partly penetrated into dentinal tubule in the process of clearing root canal by preparation instrument and forming root canal on treating it caused by endodontic disease. It plays significant roles in the success of root canal therapy and postoperative long-term effect. it is unable to be eliminated by ordinary flushing fluids like saline, distilled water, but can be cleared away by special washing fluids, like sodium hypochlorite solution, etc. Nowadays, in clinic it inevitably emerges no matter hand instrument or rotary instrument is applied for root canal cleaning or root canal has been formed. However, improvement of root canal preparation methods can reduce the emergence of smear layer. After reviewing relevant literatures, the article is going to summarize research progress of the smear layer of root canal in the aspects of its generating process, significance, and removal measures.