Abstract：Objective This study aimed to explore the research progress on sagittal translation (ST) in the surgical treatment of ankylosing spondylitis (AS) with thoracolumbar kyphosis. Methods A computer-based online search in PubMed and CNKI databases was performed to identify articles about "sagittal translation" and "ankylosing spondylitis" published in English from January 1970 to July 2021 and articles about "强直性脊柱炎" and "矢状面移位" published in Chinese from January 1970 to July 2021. A total of 109 pieces of literature were searched, and 36 pieces of literature were included after excluding those with inconsistent content, inaccessible full text, and repetitive research. Results The incidence of ST was 1.6%–27%, and cephalad displacement was commonly observed. The main reasons of ST included the inconsistency of the depth of pedicle screw insertion between the cephalad and caudal vertebral body, inconsistency of the hinge point of the rod and osteotomy space, inconsistency of the osteotomy space between the cephalad and caudal vertebral body, large correction of kyphosis, high modified Stoke ankylosing spondylitis spine score. Preventive measures included the use of temporary fixation rods and cages, reduction guides, and adjustable surgical postures during operation. Once ST occurred, dural and nerve root decompression should be performed immediately. Surgical intervention included laminectomy and/or pedicle resection, decompression, and ST reduction. Not all ST presented neurological symptoms, and differences in the recovery of neurological function were observed after surgery. The difference in ST criteria among the included literature may be of importance. Conclusion ST in AS osteotomy is closely related to the depth of pedicle screw insertion, the curvature of the rod, and the symmetry of the osteotomy surface. Immediate dural and nerve root decompression and ST reduction are considered as effective measures to prevent further deterioration of nerve function. The mechanism of spontaneous remodeling of the spinal canal following ST is currently unknown. Thus, it needs to be further studied in the future.
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2022, Vol. 27 
