生物力学比较所有接悬浮按与插入胸下双肩道的干扰螺丝
Fa-Chuan Kuan1, Kai-Lan Hsu1, Fang-Hsien Lin2
1Department of Orthopaedic Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Skeleton Materials and Bio-compatibility Core Lab, Research Center of Clinical Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Medical Device Innovation Center, National Cheng Kung University, Tainan, Taiwan.
所有接按 (ASB) 提供类似的硬性和故障负载干扰螺丝 (IS) 双肩形. ASBs对骨骨折的抵抗性更强,但周期性移位增加.
科学领域:
- 整形外科手术 整形外科手术
- 生物医学工程 生物医学工程
- 肌肉骨研究 研究
背景情况:
- 全针按 (ASB) 和干扰螺丝 (IS) 是常见的固定方法,用于插入胸下双肩肌.
- 在此过程中,ASB和IS之间缺乏直接的生物力学比较.
研究的目的:
- 为了比较ASB与IS的生物力学特性,在内嵌子胸肌中进行固定.
- 为了评估刚性,循环移位,负载到故障和骨骨折阻力.
主要方法:
- 16个人类尸体的肩膀经历了采用ASB或IS固定的内嵌双肩.
- 标本进行了预加载,循环加载 (5-70N),负载到故障测试,以及双点部曲测试.
主要成果:
- 在ASB和IS组之间没有发现硬度或最终故障负载的显著差异.
- 在ASB组显示显著更大的周期性位移 (6.8 ± 2.6毫米对比3.8 ± 1.1毫米) 和失效前的位移 (11.9 ± 1.6毫米对比7.8 ± 1.5毫米).
- ASB 固定导致最大负荷 (2354.8 ± 285.1 N 与 2086.4 ± 296.1 N 相比) 和部骨折前的位移显著增加.
结论:
- ASB固定提供了可比的刚性和故障负载,以IS固定用于内置的胸下双肩形.
- 在曲应力下,ASB固定表现出对部骨折的优越抵抗力.
- 随着ASB固定增加的循环位移值得在临床应用中考虑.
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