Controversies exist about the best treatment of burst fractures of the thoracolumbar spine. Adding screws in fractured segment has been proved in many literatures that can improve construct stiffness but sometimes aggravate the trauma of fractured vertebra. Therefore, we are eager to find an optimized placement of two additional pedicle screws at the fracture level for the treatment of thoracolumbar burst fractures. This is the first randomised controlled study investigating efficacy of diverse orders of pedicle screws placement and will provide recommendations for treating patients with thoracolumbar burst fractures.
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compression ratio change of anterior border of vertebral body height
Timeframe: preoperatively, intraoperatively, on day 3 postoperatively and then at 1, 3, 6, 12 and 24 months postoperatively
Depth of nail into injured vertebrae
Timeframe: at postoperation immediately
Kyphosis (Cobb) angle change
Timeframe: preoperatively, intraoperatively, on day 3 postoperatively and then at 1, 3, 6, 12 and 24 months postoperatively