牙髓—牙周联合损害,系指牙髓疾病和牙周疾病互为因果地同时存在,形成特殊的临床表现、临床过程,要求特定的治疗措施。50年代以前,牙周袋接近某一牙根的根尖、即使该牙其余牙根的牙周情况良好也不能作牙周治疗而必须拔除;又如多根牙根尖感染,若某一牙根的情况不宜作根管治疗,其它牙根的情况无论多好也必须拔除;所以牙周治疗和根管治疗的适应征相当窄,许多可以保留的牙被拔掉了。如果采用牙髓—牙周联合治疗,进行牙髓—牙周同时治疗、牙根切除及牙半切除以及根管内种植等,就可以成功地保留这些过去非拔不可的牙。同时外伤性牙半脱位,牙再植及移 Endodontic - periodontal joint damage, refers to the endodontic pulp disease and periodontal disease mutual causal relationship exists, the formation of a special clinical manifestations, clinical processes, requiring specific treatment. Before the 1950s, the periodontal pocket was close to the apical root of a certain root. Even if the periodontal ligament of the remaining root of the tooth was in good condition, it could not be treated for periodontal treatment and had to be removed. For example, For endodontic treatment, no matter how good the other roots have to be removed, so the periodontal and endodontic indications are quite narrow and many retained teeth are pulled out. If the use of endodontic - periodontal treatment, endodontic periodontal treatment, root excision and partial resection and root canal planting, you can successfully retain these past non-essential teeth. At the same time traumatic tooth subluxation, replantation and transplantation