在螺丝剥离故障中拯救断片间压缩:NiTiNOL的有效性
Shannon King1, Claudia Vitale2, Rachel Grosswald2
1Enovis Foot & Ankle, Atlanta, GA, USA.
概括
标准的骨科螺丝在线程剥离时失去显著的压缩. 新型NiTiNOL/持续动态压缩 (SDC) 装置保持压缩时间更长,提供更高的安全性和在骨固定手术中潜在的更好的患者结果.
科学领域:
- 整形外科手术 整形外科手术
- 生物材料科学是生物材料的科学.
- 生物力学 生物力学
背景情况:
- 整形外科螺丝对于骨固定至关重要,提供缩减,压缩和稳定性.
- 标准螺丝与NiTiNOL/持续动态压缩 (SDC) 设备在插入扭矩,压缩和固定强度方面的比较性能尚未得到充分了解.
- 了解这些关系对于优化手术技术和设备选择至关重要.
研究的目的:
- 研究标准螺丝和SDC装置的插入扭矩,断片间压缩和固定强度之间的关系.
- 为了评估这些设备在模拟的骨再吸收条件下的性能.
- 为了将标准螺丝和SDC设备的弹性与插入时的线程剥离进行比较.
主要方法:
- 使用固体泡骨复制品和尸体样本进行测试.
- 测量了标准和SDC头骨科器件的插入扭矩,断片间压缩和固定强度.
- 在模拟骨再吸收的背景下评估断片间压缩.
主要成果:
- 压缩力随着插入扭矩增加,直到线程剥离,导致标准螺丝组中的91.9%的损失.
- 即使在线程剥离后,SDC设备也保持了显著更高的断片间压缩.
- SDC设备证明了能够在未损坏的骨头中重新引入线程的能力,以补偿剥离引起的压缩损失.
结论:
- 通过维持断片间压缩后脱落,SDC设备提供了更高的安全性.
- 外科医生可以从低射击峰值插入扭矩中获益,无论设备类型如何.
- 基于NiTiNOL的SDC设备可能是更好,因为它们对剥离和骨再吸收的弹性更强,改善了足手术等骨科手术的结果.
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