438 Benefits of Short- Versus Long-segment Fixation for the Treatment of Thoracolumbar Chance Fractures: A Comparison of Perioperative and Radiological Outcomes

Abstract

INTRODUCTION: Discussion continues regarding optimal surgical management of thoracolumbar fractures. Some have indicated long-segment posterior fixation (LSPF) is favorable when evaluating implant stability, kyphotic deformity, and pain. However, most studies either included multiple fracture subtypes or focused on burst fractures. Short-segment fixation (SSPF) may be similarly effective for a subset of patients while minimizing surgical time and length of stay (LOS). This study reviews inpatient and follow-up outcomes of chance fractures managed with SSPF versus LSPF. METHODS: Retrospective review of 50 consecutive patients with thoracolumbar distraction injuries (AO B1 and B2) at a single center over a five-year period. Patients underwent pedicle fixation one level (SSPF) or two to three levels (LSPF) above and below the fracture. Patient demographics, preoperative characteristics, and perioperative outcomes were compared between groups. Radiological outcomes were assessed by measuring Cobb angles immediately postoperatively and up to 12 months postoperatively. RESULTS: There was a 31% reduction in mean surgical time for SSPF patients vs LSPF (134 vs 195 minutes, independent samples t test, p = 0.037) without a significant difference in ICU LOS (4.6 vs 4.8 days, independent samples t test, p = 0.947), hospital LOS (15 vs 14 days, independent samples t test, p = 0.865) or complication rates (2 of 35 vs 2 of 15 patients, Fisher’s Exact, p = 0.574). Longitudinal assessment of kyphosis by measuring Cobb angles immediately postoperatively and 2 - 4, 6, 8 - 12, and > 12 months postoperatively showed no significant differences in radiological outcomes between groups. There was a trend toward an increased likelihood of discharge to home (Likelihood ratio = 5.299, ꭓ2 test, p = 0.032) with SSPF. CONCLUSIONS: SSPF is non-inferior to LSPF for thoracolumbar chance fractures while offering reduced surgery time. Our results additionally suggest SSPF may offer increased likelihood of discharge home.