本文对115例感染根管及根尖病变远期疗效观察结果进行了分析,其中成功112例,占97.3％,无改变3例。笔者对开髓提出新的洞形设计,可减少切割牙体组织,便于处理根管,增强抗力形,防止牙折和更好地保存牙齿。并对有关问题结合实践体会进行了讨论。 In this paper, 115 cases of infection of the root canal and apical lesions long-term efficacy of the results were analyzed, of which 112 cases were successful, accounting for 97.3%, 3 cases without change. I proposed a new open hole on the card-shaped design, cutting teeth can reduce the organization, easy to handle the root canal, and enhance the resistance-shaped, to prevent tooth folds and better preservation of teeth. And discussed the related issues with practice experience.