在生理负荷条件下,子冠状骨局部区域的机械反应
Shaktivesh Shaktivesh1, Fatemeh Malekipour2, R Christopher Whitton3
1Data 61, CSIRO, Clayton, VIC, 3168, Australia.
Journal of the mechanical behavior of biomedical materials
|January 25, 2024
概括
在马匹快速训练炼期间的高负载会导致亚冠骨 (SCB) 疲劳损伤. 这项研究表明,的速度可能会导致局部SCB损伤,特别是在表面区域.
科学领域:
- 兽医整形医学 兽医整形医学
- 马类生物力学 马类生物力学
- 骨生理学 骨生理学
背景情况:
- 马体育运动员的第三手骨骨折通常是由于训练期间重复重复的高负荷造成的.
- 这些负载可能导致关节表面附近的亚冠骨 (SCB) 损伤,影响性能和健全性.
- 了解SCB疲劳行为对于预防赛马终结职业生涯的伤害至关重要.
研究的目的:
- 在模拟的快速训练条件下,研究马匹运动员表面和深层SCB区域的疲劳行为.
- 确定诱导SCB微结构和机械变化的负载大小.
- 在模拟高速运动期间,在SCB中识别局部损伤模式.
主要方法:
- 从五匹纯血统赛马中采集了圆柱形的SCB标本.
- 应用模拟快速训练炼,使用重复的负载周期与不同大小的SCB标本.
- 利用微型CT扫描来检测裂纹,以及数字图像相关性 (DIC) 来分析模量和应变.
主要成果:
- 受到68到93MPa (的速度) 之间的负荷的标本显示模量下降.
- 在第二次疲劳测试中,五个标本中的两个失败了,在各种SCB区域中发现了裂.
- 与没有失败的标本相比,失败的标本在模量上表现出明显更大的下降,这表明局部疲劳损伤.
结论:
- 在的速度下经历的负荷可能会导致马子底骨的疲劳损伤.
- 在SCB中,疲劳损伤是局部的,表面区域显示出更大的易受性和残余拉伸应变.
- 这些发现提供了证据,证明了在高速马匹运动期间SCB损伤的机制,并为伤害预防策略提供了信息.
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