与板/螺丝结构相比,独立的体积内固定减少了后列骨骨折部位运动:生物机械分析
Helyn G Fraser1, M Wesley Honeycutt2, Daniel Thompson1
1Emory University Department of Orthopaedic Surgery, USA.
Journal of orthopaedics
|September 30, 2024
概括
一个单个后列螺丝 (PCS) 构造提供了可比的机械稳定性,以一个板和螺丝 (P&S) 构造用于骨折. 这种PCS固定在各种负载条件下显示骨折部位的运动较少,这表明稳定性有所改善.
科学领域:
- 整形外科手术 整形外科手术
- 生物力学 生物力学
- 创伤护理的护理人员.
背景情况:
- 涉及后柱 (PC) 的乙骨骨折需要稳定的固定以获得最佳结果.
- 目前的固定方法包括板和螺丝 (P&S) 结构和单个后列螺丝 (PCS) 结构.
研究的目的:
- 为了比较一个上骨盆重建板和后列螺丝 (P&S) 结构的机械稳定性与一个单个6.5毫米的管后列螺丝 (PCS) 结构用于涉及PC的骨骨折.
- 为了确定哪种结构在模拟生理负荷条件下表现出较少的骨折部位运动.
主要方法:
- 使用了12个复合半导体,每个结构 (P&S和PCS) 分配了6个.
- 在400N和800N的两个结构中,在坐立和立两种位置上都应用了循环负荷.
- 对每个构造物在施加的负荷下测量了断裂部位运动.
主要成果:
- 在PCS构造中,与P&S构造相比,在坐到站 (0.06毫米与0.1毫米在400N;0.13毫米与0.19毫米在800N) 和到站负荷 (0.22毫米与1.9毫米在400N;1.48毫米与4.77毫米在800N) 下,骨折部位的运动明显减少.
- 在高负荷立式站立式条件下 (800N),50%的P&S结构失败,而只有25%的PCS结构失败.
结论:
- 用单个6.5毫米的头螺丝固定囊后柱骨折,提供与P&S结构相比较的机械稳定性.
- 在具有挑战性的加载场景中,PCS结构表现出卓越的稳定性,这可以通过减少断裂运动和更高的负载到故障率来证明.
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