2025 Volume 16 Issue 11 Pages 1300-1305
Introduction: In adult spinal deformity (ASD), a sagittal vertical axis (SVA) greater than 100 mm is associated with aggravated postural balance. However, quantitative changes of standing balance before and after surgery in ASD patients were only a few studies. The aim of this study was to investigate changes in the sway of the center of gravity (COG) before and after surgery in ASD patients with a preoperative SVA> 100 mm.
Methods: This is a retrospective observational (clinical) study. Thirteen female patients with ASD (66.7±7.1 years) were SVA> 100 mm preoperatively. All patients underwent long segment at corrective fusion surgery from the middle to lower thoracic spine to pelvis. The examination of the sway of the COG was measurement eye-opening, barefoot and closed legs with standing position for 60 seconds on the stabilometry. We used 6 parameters: the enveloped area, total track length, total left and right distance traveled, total anteroposterior distance traveled, coronal plane (X axis) mean deviation, sagittal plane (Y axis) mean deviation. Spinopelvic alignment and the angles of the lower extremity joint were analyzed using EOS system. The results were compared preoperatively and one year postoperatively.
Results: The post-operative SVA was significantly improved than pre-operative (31.2±33.3 mm vs. 158.5±40.0 mm, p<0.01). Total track length, total anteroposterior distance traveled, sagittal plane (Y axis) mean deviation were significantly reduced following surgery (p<0.02). Enveloped area, total left and right distance traveled, coronal plane (X axis) mean deviation showed no significant difference.
Conclusions: Compensatory posture was improved by corrective fusion surgery, affected the sway of the COG.
