chapter14,牙周牙髓联合病变 PPT.pptVIP

14;根管侧支　Lateral root canal　或副根管　Accessory canal;;; The pulp was non-vital and the tooth was endodontically treated. After prosthetic therapy ;;根尖脓肿沿牙周的可能排脓途径;; after 18 M ;;２，牙髓治疗过程中或治疗后造成的牙周病变;Angular bone defect at the distal root surface of a mandibular premolar (arrows). The root is per forated. Conceivably, this occurred in conjunction with preparation of the root canal for a post and core. Clinical symptoms included drainage of pus from the pocket and increased tooth mobility. The tooth was extracted.;Perforation of the pulpal floor of the mandibular first molar occurred in conjunction with a search for root canal openings (a). The perforation was immediately sealed with gutta-percha (b). One month after treatment a slight radiolucency appeared at the perforation site (arrow) in the periodontium (c). After an observation period of 2 years, normal periodontal conditions were re-established both clinically and radiographically;;;RCT治疗后可发生牙根纵裂: 主要由于扩根过度,桩核不当, 过大合力等;;;;External Root resorption ;Surface resorption;Replacement resorption;External inflammatory resorption;牙周病变对牙髓的影响 Iinfluence of periodontal disease on the pulp;14-3 治疗原则 Treatment strategies for vombined endodontic and periodontal lesions;2，逆行性牙髓炎　　主要看患牙能否保留 　牙髓初步治疗，如病变可以控制，牙髓－牙周同时治疗