Selective fusion in adolescent idiopathic scoliosis: a radiographic evaluation of risk factors for imbalance

Author:

Studer D.1,Awais A.2,Williams N.2,Antoniou G.2,Eardley-Harris N.2,Cundy P.2

Affiliation:

1. Orthopaedic Department, University Children’s Hospital, PO Box 4031, Basel Switzerland

2. Orthopaedic Department, Women’s and Children’s Hospital, Adelaide Australia

Abstract

Study design Retrospective database, chart and medical imaging review. Objectives To report on the outcome and evaluate possible risk factors for postoperative complications following selective spinal fusion in patients with adolescent idiopathic scoliosis (AIS). Materials and methods All patients with AIS who underwent either a selective thoracic or selective thoracolumbar/lumbar spinal fusion at our institution from January 2001 to December 2011 inclusive were included in this study. The minimum postoperative follow-up period of all patients was 2 years. Results During the 11-year study period, 157 patients with AIS underwent surgery for their progressive spinal deformity. Thirty patients (19 %) had a selective spinal fusion, with 16 patients (group A) having a selective thoracic, and 14 patients (group B) having a selective thoracolumbar/lumbar spinal arthrodesis. In both groups the main postoperative complications were adding-on (25 % group A, 36 % group B) and coronal decompensation (25 % group A, 29 % group B). In group A, no statistically significant risk factors for postoperative complications were identified. In group B, global coronal balance was identified as a significant risk factor for adding-on. Patients with adding-on had significantly higher coronal balance scores (mean 3.6) than those who did not experience adding-on (mean 1.9) (p = 0.03). In addition, those with adding-on had a significantly smaller bending lumbar Cobb angle (mean 15) than those without adding-on (mean 31.6) (p = 0.015). None of the patients who underwent selective spinal fusion required revision surgery. Conclusion Although the complication rate after performing a selective spinal fusion is high, the revision rate remains low and the debate whether or not to perform a selective spinal fusion will continue.

Publisher

SAGE Publications

Subject

Orthopedics and Sports Medicine,Pediatrics, Perinatology and Child Health

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