对骨骨折进行2.7mm和3.5mm锁定压缩板的比较:生物力学评估
Jenna M Wahbeh1,2, Benjamin V Kelley3, Cyrus Shokoohi2
1The J. Vernon Luck, Sr., M.D. Orthopaedic Research Center, Luskin Orthopaedic Institute for Children in Alliance with UCLA, Los Angeles, CA.
概括
与3.5毫米板相比,用于骨骨折固定的下方2.7毫米板显示出更大的灵活性和减少折裂风险. 虽然3.5毫米板块提供了更好的初始稳定性,但它们导致了折断,与2.7毫米板块不同,这些板块塑性变形.
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
- 创伤研究研究创伤研究
背景情况:
- 植入物的突出位置是骨骨折固定的一个问题.
- 下面的轮板可以减轻这个问题.
- 不同板尺寸的生物力学特性对于稳定性至关重要.
研究的目的:
- 为了比较2.7mm和3.5mm锁定压缩板用于骨骨折固定的生物力学强度和稳定性.
- 为了评估板块尺寸对断片间运动和构造故障的影响.
主要方法:
- 在体外研究使用横和斜骨折模型 (N=20).
- 用2.7mm和3.5mm的锁定压缩板进行固定.
- 循环轴扭转和悬臂曲试验,然后进行负载到故障分析.
主要成果:
- 2.7毫米板块的断片间运动明显大于3.5毫米板块的断片间运动 (P < 0.01).
- 3.5毫米板显示较低的运动,但始终失败的折射在远端的螺丝孔.
- 2.7毫米板在过度负荷下塑性变形,避免折射.
结论:
- 3.5毫米板块提供更大的初始稳定性,但容易折断.
- 2.7-毫米板,尽管更高的运动,表现出通过塑料变形的灾难性故障的优越抵抗力.
- 板材的选择应考虑断裂模式和运动控制与折射风险之间的权衡.
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