Abstract：Objective To summarize and conclude recent development of Proximal junctional kyphosis (PJK).Methods To search the references related to PJK using "proximal junctional kyphosis", "incidence", "spine" and “近端交界性后凸”,“发生率”,“脊柱” as the key words in the PubMed and Wanfang database from January 2000 to May 2015. To summarize in aspect of biomechanical influence factors, the radiographic parameters, the diagnosis, type, the clinical factors of PJK.Results By analyzing and concluding, using cross-linkage at proximal area can decrease the incidence of PJK, however, older age at surgery＞50 years, lumbar lordosis angle＞30°, preoperatively thoracic scoliosis angle>30°, thoracic kyphosis＞30°, change of lumbar lordosis angle between preoperatively and postoperatively＞30°, thoracic kyphosis angle of T5-T12 thoracic kyphosis＞40°, combination of anterior and posterior surgery were probably risk factors of PJK. There was no consensus on the point of view of PJK diagnosis and surgical indication for revision of PJK.Conclusions PJK occurs as a result of interaction of multiple factors. It is certainly associated with the biomechanics of the spine, radiographic parameters, and clinical factors. But the risk factors of PJK are still unclear, and need to be explored by further study.
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2016, Vol. 21 
