Posterior short segment fixation including the fractured vertebra combined with kyphoplasty for unstable thoracolumbar osteoporotic burst fracture

Background Various studies have described the efficacy and safety of the treatment for unstable thoracolumbar osteoporotic burst fracture, however, there is still no consensus on the optimal treatment regimen. The aim of this study was to evaluate the clinical and radiographic results of posterior short segment fixation including the fractured vertebra (PSFFV) combined with kyphoplasty (KP) for unstable thoracolumbar osteoporotic burst fracture. Methods Forty-three patients with unstable thoracolumbar osteoporotic burst fracture underwent PSFFV combined with KP from January 2015 to December 2017 were analyzed retrospectively. Visual Analogue Scale (VAS) and Oswestry Disability Index (ODI) was used to evaluate the clinical outcome, radiological parametres including local kyphotic Cobb angle, percentage of the anterior, middle and posterior height of the fractured vertebra were measured and compared pre-operation, post-operation and at final follow-up. Results All patients underwent surgery successfully and with an average follow-up of 19.2 +/- 6.7 months (rang 15-32). The VAS decreased from 7.1 +/- 2.3 pre-operation to 1.6 +/- 0.4 at the final follow-up (p < 0.05). The ODI decreased from 83.1 +/- 10.5 pre-operation to 19.2 +/- 7.3 (P < 0.05) at the final follow-up. The correction of local kyphotic angle was 16.9 degrees +/- 5.3 degrees (p < 0.05), and the loss of correction was 3.3 degrees +/- 2.6 degrees (p > 0.05), the correction of anterior vertebral height was 30.8% +/- 8.6% (p < 0.05), and the loss of correction was 4.5% +/- 3.9% (p > 0.05), the correction of middle vertebral height was 26.4% +/- 5.8% (p < 0.05), and the loss of correction was 2.0% +/- 1.6% (p > 0.05), the correction of posterior vertebral height was 9.4% +/- 6.9% (p < 0.05), and the loss of correction was 1.6% +/- 1.3% (p > 0.05). Two cases of screw pullout and 8 cases of cement leakage were observed, but without clinical consequence. Conclusions PSFFV combined with KP is a reliable and safe procedure with satisfactory clinical and radiological results for the treatment of unstable thoracolumbar osteoporotic burst fracture.