BACKGROUND The management of thoracolumbar burst fractures traditionally involves posterior pedicle screw fixation, but it has some drawbacks. The aim of this study is to evaluate the clinical and radiological outcomes of patients with thoracolumbar burst fractures. They were treated by a modified technique that monoaxial pedicle screws instrumentation and distraction-compression technology assisted end plate reduction. METHODS From March 2014 to February 2016, a retrospective study including 42 consecutive patients with thoracolumbar burst fractures was performed. The patients had undergone posterior reduction and instrumentation with monoaxial pedicle screws. The fractured vertebrae were also inserted screws as a push point. The distraction -compression technology was used as assisting end plate reduction. All patients were followed up at a minimum of 2 years. These parameters including segmental kyphosis, severity of fracture, neurological function, canal compromise and back pain were evaluated in preoperatively, postoperatively and at the final follow-up. RESULTS The average follow-up period was 28.9 ± 4.3 months (range, 24-39mo). No patients had postoperative implant failure at recent follow-up. The mean Cobb angle of the kyphosis was improved from 14.2°to 1.1° (correction rate 92.1%). At final follow-up there was 1.5% loss of correction. The mean preoperative wedge angle was improved from 17.1 ± 7.9°to 4.4 ± 3.7°(correction rate 74.3%). The mean anterior and posterior vertebral height also showed significant improvements postoperatively, which were maintained at the final follow-up(P < 0.05). The mean visual analogue scale (VAS) scores was 8 and 1.6 in preoperation and at the last follow-up, and there was significant difference (p < 0.05). CONCLUSION Based on our experience, distraction-compression technology can assist reduction of collapsed endplate directly. Satisfactory fracture reduction and correction of segmental kyphosis can be achieved and maintained with the use of monoaxial pedicle screw fixation including the fractured vertebra. It may be a good treatment approach for thoracolumbar burst fractures.

中文翻译：

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回顾性研究：后路单轴螺钉固定结合牵引压缩技术辅助终板复位治疗胸腰椎爆裂性骨折。

背景技术胸腰椎爆裂骨折的治疗传统上涉及后椎弓根螺钉固定，但它有一些缺点。这项研究的目的是评估胸腰椎爆裂性骨折患者的临床和影像学结果。通过改良的技术对它们进行治疗，该技术采用单轴椎弓根螺钉器械和牵引压缩技术辅助端板复位。方法2014年3月至2016年2月，我们进行了一项回顾性研究，包括42例连续的胸腰椎爆裂性骨折患者。患者接受了后路复位术并使用单轴椎弓根螺钉进行了器械治疗。骨折的椎骨也插入螺钉作为推动点。分心压缩技术被用作辅助端板的减少。所有患者均接受了至少2年的随访。这些参数包括节段性后凸畸形，骨折的严重程度，神经功能，管折衷和背痛在术前，术后和最后的随访中进行了评估。结果平均随访时间为28.9±4.3个月（范围24-39mo）。在最近的随访中，没有患者发生术后植入失败。驼背的平均Cobb角从14.2°改善到1.1°（校正率92.1％）。在最后的随访中，矫正损失为1.5％。术前平均楔形角从17.1±7.9°改善到4.4±3.7°（校正率74.3％）。术后平均前，后椎体高度也有明显改善，并在最后一次随访时得以维持（P <0.05）。术前和末次随访时的平均视觉模拟量表（VAS）评分分别为8和1.6，差异有统计学意义（p <0.05）。结论基于我们的经验，分散压缩技术可直接帮助减少塌陷的端板。通过使用包括骨折椎骨的单轴椎弓根螺钉固定，可以实现令人满意的骨折复位和节段性驼背矫正。对于胸腰椎爆裂骨折，这可能是一种很好的治疗方法。通过使用包括骨折椎骨的单轴椎弓根螺钉固定，可以实现令人满意的骨折复位和节段性驼背矫正。对于胸腰椎爆裂骨折，这可能是一种很好的治疗方法。通过使用包括骨折椎骨的单轴椎弓根螺钉固定，可以实现令人满意的骨折复位和节段性驼背矫正。对于胸腰椎爆裂骨折，这可能是一种很好的治疗方法。