根管感染引起根尖周围病变形成。根管治疗的目的是消除这些病变。当这种病变导致骨质呈离心性吸收或根尖病变向心性修复期间,X线片可以表现出根尖区的这些动力学变化。有关充填步骤和重建正常外形的评价,是通过连续X线片检查对照。在同一条件下 Root canal infection caused by the formation of lesions around. The purpose of root canal therapy is to eliminate these lesions. These radiographs show these kinetic changes in the apex area during this pathological change that results in either a centrifugal absorption of the bone or a centripetal repair of the apical lesion. The evaluation of the filling procedure and reconstruction of the normal appearance was performed by continuous X-ray examination. Under the same conditions