Abstract:

Root canal debridement and infection control are two of the main steps in root canal therapy. Bacteria will be present as biofilm colonies inside the root canal，and it will be well within fins，intercanal anastomoses，apical ramification，apical furcation or lateral accessory canal. Meanwhile，during the cleaning and shaping process，smear layer can be produced，which can be used for the viable bacteria inside the complex anatomical structure to sustain growth and activity. In addition，due to the complexity of the root canal system，the conventional irrigation and disinfection technology is superficial，then the smear layer and Enterococcus faecalis biofilms are difficult to remove. In recent years，lasers，as a novel adjuncting irrigation tool，are used clinically，such as Er∶YAG laser and Er，Cr∶YSGG laser. As is reported，laser-activated irrigations can effectively remove the smear layer and the infection and obtain better disinfection rates. So in this a review，we made a summary of the effect of laser-activated irrigations on endodontics.

Key words: Er∶YAG laser；Er, Cr∶YSGG；root canal irrigation；root canal disinfection

摘要：

根管清理和感染控制是根管治疗的两个重要步骤。在根管内细菌以生物膜的形式存在，其可隐藏在根管峡部、根尖分歧、根尖分叉、侧枝根管等复杂的解剖结构中；同时，在根管预备过程中可产生玷污层，玷污层能为细菌的生长繁殖提供基质，其也可附着于上述复杂的解剖结构中。由于根管系统的复杂性，难以通过常规的冲洗消毒方法彻底清除菌斑生物膜，近年来激光作为一种新型的辅助冲洗消毒的工具逐渐应用于临床，最为常用的是铒激光（Er∶YAG和Er，Cr∶YSGG激光），研究报道激光辅助根管荡洗可有效去除玷污层并清除根管内的感染，从而获得更好的消毒效果。文章就激光活化荡洗在根管治疗中的作用做一概述。

关键词: Er∶YAG激光, Er, Cr∶YSGG激光, 根管荡洗, 根管消毒