Necessity of Direct Decompression for Thoracolumbar Junction Burst Fractures with Neurological Compromise

Abstract

Surgical management of burst fractures is controversial, with many different operative options. From a posterior approach, decompression of the spinal cord can be performed through both indirect and direct methods, the former relying on ligamentotaxis. It is unclear whether indirect decompression with ligamentotaxis is as effective as direct decompression. Prospective, randomized controlled data were retrospectively analyzed to include only burst fractures of the thoracolumbar junction. Patients were treated with either direct decompression, involving wide posterior decompression in addition to operative stabilization, or indirect decompression, where decompression was performed solely through ligamentotaxis. Patients were followed up at 6 months with clinical assessment and imaging. Additional clinical assessment was performed at 1 year. For all analyses, P < 0.05 was significant. The study included 46 patients, with 18 patients in the direct decompression subgroup and 28 patients in the indirect decompression subgroup. The average age of the full cohort was 35.1 ± 13.1 years (range, 16-60 years). Most patients had L1 fractures (21/46; 46%), with an AOSpine classification type A4 fracture morphology (17/46; 37%), and were American Spinal Injury Association grade B (18/46; 39%). Both treatments resulted in similar increases in canal diameter and decreases in dural sac compromise (P > 0.5) at 6-month follow-up. Both treatments resulted in similar grades of neurological improvement (P= 0.575) at 1 year. There were no significant differences in clinical and imaging outcomes when comparing direct decompression with ligamentotaxis. Ligamentotaxis alone may be effective in carefully selected cases.