Treatment of unstable thoracolumbar and lumbar spine injuries using Cotrel-Dubousset instrumentation.

Study Design: In this prospective study, the results of treating unstable thoracolumbar and lumbar injuries with Cotrel-Dubousset instrumentation were investigated.
Objective: To determine the pain and work status of the patients, to evaluate neurologic status, and to assess the efficacy of instrumentation in the short term.
Summary of Background Data: Short-segment pedicle screw construct is the method of choice for reduction and stabilization of unstable thoracolumbar spinal injuries. Many investigators have recently reported a high rate of instrument failure. In this study, the use of segmental transpedicular fixation two levels above the kyphosis decreased instrument failure and sagittal collapse.
Methods: Thirty patients, who had unstable thoracolumbar and lumbar spinal injuries, underwent application from a posterior approach of Cotrel-Dubousset instrumentation two levels above and one below at the thoracolumbar junction and short segment fixation in the lumbar area. Radiologic parameters were evaluated before and after surgery.
Results: The mean follow up was 31 months (range, 25-49) months. There were statistically significant differences between the pre- and postoperative values in all radiologic parameters. Neurologic status improved in 70% of the patients, with a mean Frankel grade of 1.3 grades.
Conclusions: Cotrel-Dubousset instrumentation provided spinal stability in unstable injuries, forming a rigid construct and restoring physiologic thoracolumbar and lumbar postural contours because of its highly corrective effect in the sagittal profile with no loss of correction.