各种类型牙髓炎未及时处理进一步发展为慢性根尖周炎,是口腔门诊常见病,可以采用根管治疗,根管治疗目前被认为是治疗牙髓病及根尖周病最根本和最有效的治疗方法~([1])。根管预备是根管治疗中关键步骤之一,去除根管内及根管壁中的感染物质并将根管扩大成形,为根管消毒及根管充填创 Various types of pulpitis is not promptly treated further development of chronic apical periodontitis, is a common out-patient clinic, you can use root canal therapy, root canal therapy is currently considered to treat pulp disease and apical period disease is the most fundamental and most Effective treatment ~ ([1]). Root canal preparation is one of the key steps in root canal therapy. It removes the infectious substances in the root canal and the root canal wall and enlarges the root canal. It is used for root canal disinfection and root canal filling