干扰螺丝和接固定用于侧向外关节接,不会产生负载到故障的显著差异,而主食固定滞后:一个尸体生物力学研究
Ron Gilat1, Zeeshan A Khan1, Juan Bernardo Villareal-Espinosa1
1Rush University Medical College, Chicago, Illinois, U.S.A.
概括
比较侧向外关节透 (LET) 的固定方法,干扰螺丝和接是可行的选择. 具出现了早期的故障,而在高负载下提供了比螺丝更少的刚性.
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
- 运动医学 运动医学
背景情况:
- 侧侧外关节形术 (LET) 是一种常见的手术程序.
- 对LET的固定技术影响生物力学特性和故障模式.
- 干扰螺丝可能导致道收,促使研究替代方法.
研究的目的:
- 为了比较三种LET固定技术的生物力学特性和故障机制:onlay主,inlay干扰螺丝和onlay全接.
- 评估基于表面的固定方法的性能,作为螺丝固定的替代方案.
主要方法:
- 人类尸体膝盖 (24对) 被随机分为主,干扰螺丝或全接固定.
- 所有标本都采用了经过修改的Lemaire LET技术.
- 生物力学测试评估了循环负载和负载到故障的结果,使用拉力测试装置.
主要成果:
- 在循环加载过程中,有三个固定于接器的LET发生故障.
- 与干扰螺丝 (250.8 N) 相比,主线 (174.1 N) 的最大负载至故障显着较低.
- 与主 (11.3毫米) 相比,全接在最大负载下表现出更高的位移 (22.2毫米).
结论:
- 主食固定与LET早期失败有关.
- 干扰螺丝和全接固定装置都适用于LET.
- 与干扰螺丝和具相比,全接在高负载下提供较少的刚性.
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