碳纤维增强的聚乙基和 (Ti-6Al-4V) 锁板结构的门螺丝插入扭矩
Ramzi Nasr1, Elise Pegg2, Fedra Zaribaf3
1Department of Mechanical Engineering, University of Bath, Bath, UK.
Clinical biomechanics (Bristol, Avon)
|February 11, 2026
概括
碳纤维增强聚乙基 (CFR-PEEK) 板的最佳插入扭矩约为1.5Nm. 较高的扭矩并不能始终提高结构强度,并且可能增加植入物损伤的风险.
科学领域:
- 骨科生物力学 骨科生物力学
- 生物材料科学是生物材料的科学.
- 可以植入的医疗器械.
背景情况:
- 锁定板结构对于骨折固定至关重要,特别是在骨质疏松性骨中.
- 碳纤维增强聚乙烯基 (CFR-PEEK) 板具有比更接近骨的机械性能.
- 对于CFR-PEEK板的最佳螺丝插入扭矩仍然没有确定.
研究的目的:
- 为了研究插入扭矩对CFR-PEEK锁板机械性能的影响.
- 为了比较CFR-PEEK板材与传统合金 (Ti-6Al-4V) 板材的性能.
- 为了确定CFR-PEEK锁定螺丝固定的最佳插入扭矩.
主要方法:
- 锁定螺丝被插入到Ti-6Al-4V和CFR-PEEK板上,以不同的扭矩水平 (0.5-3.0Nm).
- 构造强度是使用轴向推出和悬臂曲测试来评估的.
- 分析了螺丝旋转与插入扭矩的相关性.
主要成果:
- 插入扭矩显示与螺丝旋转有线性关系.
- 对于CFR-PEEK单螺杆结构,扭矩≥2Nm提高了推出强度,而1.5Nm最大化了悬臂强度.
- 在两CFR-PEEK结构中,在测试的扭矩之间没有观察到显著的性能差异.
结论:
- 插入扭矩超过大约0.5Nm并没有持续提高构造性能.
- 适度的扭矩,大约1.5纳米,似乎可以优化性能,并最大限度地降低植入物损伤的风险.
- 这些发现支持CFR-PEEK板在断裂固定中的机械可靠性.
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