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Background Posterior pedicle screw fixation had been applied to maintain spinal stability and avoid further nerve damage in thoracolumbar fracture. This study aimed to evaluate the efficacy of short-segment posterior fixation with monoaxial pedicle screws versus polyaxial pedicle screws in treating thoracolumbar fracture. Methods A total of 75 patients with thoracolumbar fracture who underwent short-segment posterior fixation with monoaxial pedicle screw (group A) or polyaxial pedicle screw (group B) were retrospectively enrolled. The patient demographic and radiological data were analyzed between the two groups. Results A total of 63 patients with an average age of 44.7±11.5 years were finally recruited in this study. There were no significant differences in age, gender, fracture level, thoracolumbar injury classification and severity scale (TLISS) score, American Spinal Injury Association (ASIA) score, Arbeitsgemeinschaft fur Osteosynthesefragen (AO) classification, and hospital stay between the two groups (P>0.05). At the last follow-up, the prevertebral height ratio and normal-to-injured vertebral height ratio were significantly decreased in group A compared to group B (P=0.027 and P=0.007, respectively). Conclusions Short-segment posterior fixation with monoaxial or polyaxial pedicle screw for fractured thoracolumbar vertebra can restore injured vertebral height. Compared with polyaxial pedicle screw, monoaxial pedicle screw endows stronger leverage which is more beneficial for restoring injured vertebral height and recovery of the damaged endplate in thoracolumbar short-segment posterior fixation.

Purpose: To evaluate the therapeutic effects of short-segment posterior fixation with monoaxial pedicle screw or polyaxial pedicle screw via injured vertebra on thoracolumbar fracture.Methods: All patients who underwent short-segment posterior fixation with monoaxial pedicle screws or polyaxial pedicle screws in the injured vertebra of a thoracolumbar fracture (T12-L2). The clinical and radiological data such as the correction of deformity, sagittal profle and record of the perioperative morbidity of the patients were analyzed.Results: There were 63 patients (21 males and 42 females) with an average age of 44.7 years and were categorised into two groups: monoaxial pedicle screws group (group A) and polyaxial pedicle screws group (group B). There were no significant differences in age, gender, fracture site, TLISS Score, ASIA Score, AO Classification, hospital stay, Injury-to-operation intereval, and associated injury between the two groups (P>0.05). Howere, compared with group B, the injury vertebral endplate centre ratio significantly increased postoperatively and at the final follow-up (PConclusion: Short-segment posterior fixation with monoaxial or polyaxial pedicle screws via the fracture level for thoracolumbar fracture can achieve kyphosis correction, reduce sagittal alignment correction failure, and maintain anterior vertebral height. The insertion of monoaxial pedicle screws at the fracture level after thoracolumbar vertebral fracture has a flick up ffect on the central vertebral body of the injured vertebrae, which is beneficial to the recovery of the vertebral endplate.

Purpose: To evaluate the use of short-segment posterior fixation with monoaxial and polyaxial pedicle screws in thoracolumbar fractures Methods: All patients who underwent short-segment posterior fixation with monoaxial pedicle screws or polyaxial pedicle screws in the injured vertebra of a thoracolumbar fracture (T12-L2) in our hospital between June 2012 and December 2018 were categorised into two groups: monoaxial pedicle screws group (group A) and polyaxial pedicle screws group (group B). We compared the Thoracolumbar Injury Severity Score (TLISS), American Spinal Injury Association (ASIA) score, the fracture level, Arbeitsgemeinschaft für Osteosynthesefragen (AO) classification, hospital stay, injury-to-operation interval, and associated injuries between the two groups. In addition, the prevertebral height ratio, the injured vertebra Cobb angle, and the injured vertebral endplate centre ratio were measured preoperatively, postoperatively, and at the final follow-up. Results: There were 63 patients (21 males and 42 females) with an average age of 44.7 years. Compared with group B, the injury vertebral endplate centre ratio significantly increased postoperatively and at the final follow-up (P