Restoration of normal pelvic balance from surgical reduction in high-grade spondylolisthesis
verfasst von:
Abdulmajeed Alzakri, Hubert Labelle, Michael T. Hresko, Stefan Parent, Daniel J. Sucato, Lawrence G. Lenke, Michelle C. Marks, Jean-Marc Mac-Thiong
To investigate the effectiveness of surgical reduction in high-grade spondylolisthesis in maintaining or restoring a normal pelvic balance, as related to the QoL.
Methods
It is a retrospective analysis of prospectively collected data of 60 patients (17 males, 43 females) aged 15 ± 3.1 years who underwent surgery for high-grade spondylolisthesis and were followed for a minimum of 2 years after surgery. Patients with a residual high-grade slip following surgery were referred to the postoperative high-grade (PHG) group, while patients with a residual low-grade slip were referred to the postoperative low-grade (PLG) group. Pelvic balance was assessed from pelvic tilt and sacral slope, in order to identify patients with a balanced pelvis or unbalanced pelvis. The SRS-22 questionnaire was completed before surgery and at last follow-up.
Results
Postoperatively, there were 36 patients with a balanced pelvis and 24 patients with an unbalanced pelvis. The improvement in QoL was better in patients with a postoperative balanced pelvis. There were 14 patients in the PHG group and 46 patients in the PLG group. Four of seven patients (57%) in the PHG group and 21 of 26 patients (81%) in the PLG group with a preoperative balanced pelvis maintained a balanced pelvis postoperatively (P = 0.1). None of the patients in the PHG group and 11 of 20 patients (55%) in the PLG group improved from an unbalanced to a balanced pelvis postoperatively (P < 0.05).
Conclusions
Surgical reduction in high- to low-grade slip is more effective in maintaining and restoring a normal pelvic balance postoperatively.
Graphical abstract
These slides can be retrieved under Electronic Supplementary Material.
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