Chinese Journal of Tissue Engineering Research ›› 2021, Vol. 25 ›› Issue (21): 3395-3400.doi: 10.3969/j.issn.2095-4344.3861

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Advantages and significance of S2 alar iliac screw fixation in sacropelvic fixation

Liu Gang, Yang Qiang, Hao Yonghong, Deng Shucai   

  1. Tianjin Hospital, Tianjin 300211, China
  • Received:2020-09-24 Revised:2020-10-13 Accepted:2020-11-21 Online:2021-07-28 Published:2021-01-25
  • About author:Liu Gang, Doctoral candidate, Attending physician, Tianjin Hospital, Tianjin 300211, China
  • Supported by:
    the General Program of National Natural Science Foundation of China, No. 81871782 (to YQ)

Abstract: BACKGROUND: In the surgical treatment of spinal deformities and tumors, the firm and stable fixation of the lumbosacral junction is a task that must be completed in the operation, and it is a relatively great challenge. The incidence rate of postoperative complications (such as pseudarthrosis, failure of internal fixation and loosening) is high. The mechanical strength of the bone tissue in the sacrum is low, and the high load in the lumbar vertebrae and pelvis increases the risk of internal fixation pullout, which further leads to the loosening of the instrument. Although there are some of the most effective surgical techniques, the complexity of surgical techniques often leads to unsatisfactory clinical results
OBJECTIVE: To summarize the latest research progress on the sacropelvic fixation and clinical applications of the S2 alar iliac (S2AI) screws, and provide a reference for clinical treatment.
METHODS: The computer was used to search articles published from 2005 to 2020 in CNKI, Wanfang, and PubMed. The search terms were “S2 alar iliac screw, S2AI, iliac screw, sacropelvic fixation, alar iliac screw” in English and Chinese. Relevant articles were consulted, and finally 43 articles were included for analysis.
RESULTS AND CONCLUSION: (1) Sacral pelvic fixation, such as ilium and S2AI screw, was added to the lower end of long segmental fixation of the spine to solve the above-mentioned related complications. (2) S2AI screw placement technique plays an important role in stabilizing sacroiliac joint. Because of its unique screw placement method, it avoids screw dislocation, reduces postoperative sacroiliac joint pain and reduces the risk of reoperation. (3) As a new technology of spinal and pelvic fixation, S2AI screw has many advantages and clinical significance, but due to the complex and diverse structure of sacroiliac joint and individual differences of patients, there are still related problems in clinical application of S2AI screw.

Key words: S2 alar iliac screw, iliac screw, screw placement, freehand, navigation

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