一些慢性根尖周炎患牙病程迁延,复诊次数多,片示根尖破坏面积较大,常规根管治疗,不能达到治愈的这类患牙临床上称为难治性根尖周炎。我科自2006年开始对这一类患牙进行综合治疗,收到了良好的临床效果,现报告如下。资料与方法一、一般资料:选择病程迁延、反复肿痛、X片显示根尖? Some chronic periapical periodontal disease duration of the disease, the number of referrals, film shows a large apical destruction, conventional root canal therapy, can not be cured of these clinically clinically known as refractory periodontitis. Our department since 2006, this type of tooth comprehensive treatment, received a good clinical effect, are as follows. Materials and Methods First, the general information: Select the duration of the disease, repeated swelling and pain, X-ray shows apical?