Abstract: ［Abstract］ Objective To analyze the causes of kyphosis deformity after short?segment posterior pedicle screw fixation for thoracolumbar fracture. Methods A retrospective clinical study was donein 39 patients with thoracolumbar fractures who had kyphosis deformity after short?segment posterior pedicle screw fixation in our hospital from 2014 to 2018. Results In our data， many reasons led to kyphosis deformity after thoracolumbar fracture surgery. The kyphosis deformity in the early stage was mainly due to inappropriate surgical methods，and within one year mostly due to short fixed segment or screw， which could not support fixation effectively；no external fixation brace or external fixation was unreliable； the patient had osteoporosis and severe injury of intervertebral disc. Kyphosis after removal of internal fixation was mainly due to poor stability of fracture decompression and fixation without adequate bone graft fusion. Conclusion In the present study， the surgical treatment of thoracolumbar fractures depended on the correct diagnosis， appropriate surgical methods and effective bone graft fusion.

Key words: kyphosis, causes, fracture of thoracolumbar spine

摘要： ［摘要］ 目的 总结分析胸腰椎骨折短节段内固定术后继发后凸畸形的原因。方法 回顾性分析我科自2014年至2018年胸腰椎骨折行短节段内固定治疗术后继发后凸畸形39例。结果 胸腰椎骨折术后脊柱后凸原因较多，早期主要在于手术操作有欠缺；1年内发生后凸畸形，多为固定节段短或螺钉短，不能有效支撑固定；未佩戴外固定支具或支具不牢靠且活动量大；患者骨质疏松；取出内固定后发生脊柱后凸主要在于稳定性差的骨折减压固定未给予充分植骨融合；椎间盘严重损伤，取出后再次塌陷。结论 从当前病例总结，胸腰椎骨折的手术治疗效果在于胸腰椎骨折的正确诊断、合适手术方式和有效的植骨融合。

关键词: 原因分析, 胸腰椎骨折, 后凸畸形