增长对脊柱生物力学和VBT中的带力的影响:一项模拟研究
Jil Frank1,2, Miguel Pishnamaz3, Per David Trobisch4
1Department of Orthopaedics, Trauma and Reconstructive Surgery, Uniklinik RWTH Aachen, Aachen, Germany. jil.frank@rwth-aachen.de.
概括
脊椎体绑定 (VBT) 保护脊柱运动在脊柱脊椎病. 这项研究开发了一个成长的脊柱模型,显示VBT在成长过程中增加了脊柱压缩力,特别是在L1和L2之间.
科学领域:
- 生物机械工程 生物机械工程
- 整形外科手术 整形外科手术
- 脊柱生物力学 脊柱生物力学
背景情况:
- 脊柱体绑定 (VBT) 是一种用于纠正脊椎病的手术技术,旨在保持脊柱的运动性.
- 虽然关于VBT的临床数据越来越多,但需要对其生物力学有更深入的了解,特别是与脊柱生长相结合.
- 现有的知识差距阻碍了在发育阶段在VBT后对脊椎起作用的力量的全面分析.
研究的目的:
- 开发一个模拟生长的,灵活的脊柱的计算模型,用脊柱体连接 (VBT) 处理.
- 研究VBT在成长过程和生理运动期间对脊柱力量的生物力学影响.
- 在模拟的VBT场景中量化带张力和脊椎间压缩力.
主要方法:
- 采用多体模拟方法来创建一个灵活的胸脊柱模型.
- 该模型包含一个模拟的脊椎身体连接 (VBT) 设备和肌肉骨系统.
- 生物力学参数,包括绳索张力和脊椎间压缩,根据解剖学和材料特性进行计算.
主要成果:
- 模拟的脊柱生物力学表明,在生长过程中,带和压缩力不断增加,在L1和L2之间达到峰值.
- 在50°横向曲时观察到最大的带力,前应力为200N.
- 在青春期,模拟的绑定脊柱的脊椎间压缩力高达健康脊柱的两倍.
结论:
- 开发的生物机械模型为在VBT后运动和生长期间脊柱力量提供了宝贵的见解.
- 模拟发现与现有临床数据一致,表明手术时的年龄和残留生长对带力的影响最小.
- 一个重要的发现是,在VBT患者的整个生长期内,脊椎间压缩力逐渐增加.
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