牙髓根尖周病是口腔科临床最常见的牙齿疾病。由于特殊的解剖结构,牙髓根尖周病若不彻底治疗,将严重影响患者的全身和口腔健康。牙髓根尖周病的治疗方法较多,其中根管治疗是最有效的方法。由于牙齿解剖结构和根管系统的复杂性、变异性、个体性及多样性,根管治疗操作难度大,技术要求高。所以建立根管治疗难度评估标准,在治疗前对患牙进行 Apical periapical disease is the most common dental disease in the dental clinic. Due to special anatomy, apical periodontal disease if not thoroughly treated, will seriously affect the patient’s systemic and oral health. Endodontic pulp treatment of many ways, including root canal therapy is the most effective way. Due to the complexity, variability, individuality and diversity of dental anatomy and root canal system, root canal treatment is difficult and requires high technical requirements. Therefore, the establishment of root canal treatment difficulty assessment criteria, before treatment of the affected teeth