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在转换中优化茎长度 整体关节整形术:扩展的有限元素分析.

Koshiro Shimasaki1, Tomofumi Nishino1, Tomohiro Yoshizawa1

  • 1Department of Orthopaedic Surgery, Institute of Medicine, University of Tsukuba, 1-1-1, Tennodai, Tsukuba 305-8575, Japan.

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概括

在转换性全关节整形术 (cTHA) 中使用更长的无水泥茎 (≥150毫米) 可以减少螺丝孔周围的压力,从而降低骨折风险并改善结果.

关键词:
转换性全关节整形手术 (cTHA)有限元素分析 (FEA)周围的假肢骨折 周周假肢骨折干的长度 干的长度 干的长度压力度压力度的压力

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科学领域:

  • 整形外科手术 整形外科手术
  • 生物机械工程 生物机械工程
  • 医疗器械设计 医疗器械设计

背景情况:

  • 转换整部关节整形手术 (cTHA) 后,周围假肢骨折是一种风险,原因是距离螺丝拆除孔的压力度.
  • 在cTHA中优化干细胞选择对于改善临床结果和减轻风险至关重要.

研究的目的:

  • 为了研究不同的无腿茎长度如何影响cTHA中远端除孔周围的应力分布.
  • 在cTHA程序中提供基于证据的干细胞选择指南.

主要方法:

  • 使用患者大腿骨的CT扫描来创建cTHA模型的有限元分析.
  • 在行走和爬楼梯负荷下模拟除螺丝孔和测试130,140,150和160毫米无杆.
  • 计算在远端除孔周围的等效应力值.

主要成果:

  • 与130毫米的茎相比,150毫米和160毫米的股骨茎显著减少了距离螺丝拆除孔周围的最大等效应力.
  • 与其他测试的长度相比,140毫米的茎在减压方面没有显著差异.

结论:

  • 150毫米或更大的无水泥茎长度有效地减轻cTHA后的应力度.
  • 较长的茎 (≥150毫米) 是平衡疗效和并发症风险的最佳选择,可能提高长期临床结果.