首页> 美国卫生研究院文献>Global Spine Journal >Finite Element Analysis and Biomechanical Comparison of Short Posterior Spinal Instrumentation with Divergent Bridge Construct versus Parallel Tension Band Construct for Thoracolumbar Spine Fractures
【2h】

Finite Element Analysis and Biomechanical Comparison of Short Posterior Spinal Instrumentation with Divergent Bridge Construct versus Parallel Tension Band Construct for Thoracolumbar Spine Fractures

机译:胸腰椎脊柱骨折后路短短脊柱器械分叉桥构架与平行张力带构架的有限元分析和生物力学比较

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

The ideal treatment for unstable thoracolumbar fractures remains controversial with posterior reduction and stabilization, anterior reduction and stabilization, combined posterior and anterior reduction and stabilization, and even nonoperative management advocated. Short segment posterior osteosynthesis of these fractures has less comorbidities compared with the other operative approaches but settles into kyphosis over time. Biomechanical comparison of the divergent bridge construct versus the parallel tension band construct was performed for anteriorly destabilized T11–L1 spine segments using three different models: (1) finite element analysis (FEA), (2) a synthetic model, and (3) a human cadaveric model. Outcomes measured were construct stiffness and ultimate failure load. Our objective was to determine if the divergent pedicle screw bridge construct would provide more resistance to kyphotic deforming forces. All three modalities showed greater stiffness with the divergent bridge construct. The FEA calculated a stiffness of 21.6 N/m for the tension band construct versus 34.1 N/m for the divergent bridge construct. The synthetic model resulted in a mean stiffness of 17.3 N/m for parallel tension band versus 20.6 N/m for the divergent bridge (p = 0.03), whereas the cadaveric model had an average stiffness of 15.2 N/m in the parallel tension band compared with 18.4 N/m for the divergent bridge (p = 0.02). Ultimate failure load with the cadaveric model was found to be 622 N for the divergent bridge construct versus 419 N (p = 0.15) for the parallel tension band construct. This study confirms our clinical experience that the short posterior divergent bridge construct provides greater stiffness for the management of unstable thoracolumbar fractures.
机译:不稳定的胸腰椎骨折的理想治疗仍然存在争议,包括后路复位和稳定,前路复位和稳定,后路和前路复位和稳定相结合,甚至主张非手术治疗。与其他手术方法相比,这些骨折的短节段后路骨合成合并症较少,但随着时间的推移会逐渐形成后凸。使用三种不同的模型对前稳定T11–L1脊柱节段进行发散桥结构与平行张力带结构的生物力学比较:(1)有限元分析(FEA),(2)合成模型和(3)a人类尸体模型。测得的结果是结构刚度和最终破坏荷载。我们的目标是确定发散的椎弓根螺钉桥构造是否会提供更大的抵抗后凸变形力的能力。三种形式的桥梁结构都显示出更高的刚度。 FEA计算得出张力带构造的刚度为21.6 N / m,而发散桥构造的刚度为34.1 N / m。综合模型得出,平行拉力带的平均刚度为17.3 N / m,而发散桥的平均刚度为20.6 N / m(p = 0.03),而尸体模型的平行拉力带的平均刚度为15.2 N / m与发散桥的18.4 N / m相比(p = 0.02)。尸体模型的最终破坏荷载对于发散桥梁构造为622 N,而对于平行张力带构造为419 N(p = 0.15)。这项研究证实了我们的临床经验,即较短的后发散桥结构为不稳定的胸腰椎骨折的处理提供了更大的刚度。

著录项

相似文献

  • 外文文献
  • 中文文献
代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号