根管治疗是口腔内科的基本治疗技术之一,其操作主要有三大步骤,即根管扩大和清扫、根管消毒及根管充填。这三个步骤历来被认为缺一不可。随着科学技术和临床实践的不断发展,一些作者认为在三大步骤中,根管的扩大和清扫及根管充填是最重要的,也有主张在根管预备后,不经消毒而立即进行根管充填。在根管扩大和清扫中,根管的清扫是最重要的,很多感染根管仅仅进行了根管扩大和使用了防腐剂 Root canal therapy is one of the basic treatment of oral medicine, its operation has three major steps, namely root canal expansion and cleaning, root canal disinfection and root canal filling. These three steps have always been considered indispensable. With the continuous development of science and technology and clinical practice, some authors believe that the root canal expansion and root canal filling are the most important among the three major steps, and some advocate that root canal preparation should be carried out immediately after root canal preparation without disinfection Tube filling. In the root canal expansion and cleaning, root canal cleaning is the most important, many infected root canal only root canal expansion and the use of preservatives