在简单的骨头骨折中评估骨髓内骨头螺丝固定:生物力学研究
Kelly N McKnight1, Tysen K Timmer1, Mikayla D Montgomery2
1Department of Graduate Medical Education - Sanford Health, Fargo, North Dakota; University of North Dakota, School of Medicine & Health Sciences, Grand Forks, North Dakota.
The Journal of hand surgery
|June 9, 2023
概括
一个6.5毫米的骨髓内 (IM) 骨头螺丝和锁定压缩板为骨科创伤协会/AO基金会 (OTA/AO) 2U1B1骨头骨折提供了类似的生物机械稳定性. 这为外科医生提供了可比的选择来管理这些肘部骨折.
科学领域:
- 整形外科手术 整形外科手术
- 生物力学 生物力学
- 断裂修复 断裂修复
背景情况:
- 大脑骨折,特别是骨科创伤协会/AO基金会 (OTA/AO) 2U1B1型的骨折,在实现稳定固定方面存在挑战.
- 内螺丝 (IM) 和锁压板是常见的固定方法,但它们在动态负载下的相对稳定性至关重要.
研究的目的:
- 为了生物机械地比较6.5毫米IM的olecranon螺丝与OTA/AO 2U1B1olecranon骨折的锁定压缩板的稳定性.
- 为了评估固定构造在模拟肘部运动范围期间的稳定性.
主要方法:
- 20个配对的尸体肘部经历了模拟的OTA/AO 2U1B1大脑骨折.
- 固定是使用6.5毫米IMolecranon螺丝或锁定压缩板进行的.
- 循环负荷模拟肘部运动范围 (135°) 和拉出强度测试被用于评估断裂隙位移和结构稳定性.
主要成果:
- 分析显示,固定类型和压力对骨折分心之间的显著相互作用,特别是在500个循环后.
- 虽然在特定的负载点 (5-35磅) 中注意到分心的差异,但在板 (2/80) 和螺丝 (4/80) 组之间,构造失败的整体率在统计学上并不显著.
结论:
- 生物力学测试表明,一个单个6.5毫米的IM头螺丝在模拟的肘部运动范围内提供了与锁定OTA/AO 2U1B1头骨折的压缩板相似的稳定性.
- 这两种固定方法在维持骨折减少方面都表现出类似的有效性,为外科医生提供了相应的生物机械选择来管理这些骨折.
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