滑轮半径对肌耐用性的影响 在子模型中的循环负荷下.
Brenna W Popham1, Michael J Pavol2, Kian J Kelly1
1School of Mechanical, Industrial, and Manufacturing Engineering, Oregon State University, Corvallis, Oregon, USA.
概括
滑轮半径不会显著影响植入物周围的肌耐用性. 虽然肌损伤和粘附发生在测试的半径,植入物曲率变化造成肌衰竭的风险最小.
科学领域:
- 生物材料科学 生物材料科学
- 整形外科手术 整形外科手术
- 组织工程是组织工程.
背景情况:
- 在曲的植入物表面 (轮) 周围的肌损伤尚未得到充分了解.
- 调查轮半径对肌耐用性的影响对于植入物设计至关重要.
研究的目的:
- 为了确定滑轮半径如何影响在循环负荷下肌耐用性.
- 评估植入物曲率和肌植入物相互作用之间的关系.
主要方法:
- 子扩展器digitorum communis肌被围绕着卷轴 (2,3或4.5毫米半径).
- 肌束经历了10万或50万个周期的低强度拉力负荷.
- 测量了有效的硬度和损伤/粘附的迹象.
主要成果:
- 滑轮半径对有效硬度变化没有显著影响,直到10万次循环.
- 起初,肌的有效刚度迅速增加,然后在15万次循环后线性增加.
- 在所有轮半径中观察到明显的肌损伤和粘附;没有发生肌故障.
结论:
- 植入物滑轮半径在测试范围内对肌耐用性有微不足道的影响.
- 不同的植入物曲率不会显著改变肌衰竭风险,但不会减少不良的肌植入物接触效应.
- 为了在植入物附近获得临床上可接受的肌耐用性,可能需要采取其他损伤对策.
更多相关视频
05:20Development of a Rabbit Chronic-Like Rotator Cuff Injury Model for Study of Fibrosis and Muscular Fatty Degeneration
Published on: March 31, 2023
1.9K
08:19Author Spotlight: Unraveling the Mechanobiology of Tendon Impingement – A Multiaxial Murine Hind Limb Explant Model
Published on: December 8, 2023
1.6K
相关概念视频
01:20Normal Strain under Axial Loading
1.4K
Normal strain under axial loading is an important concept in the field of mechanics of materials. Axial loading implies the application of a force along the axis of a material, like a column or bar. This force can either compress or stretch the material. In the context of axial loading, normal strain is the deformation experienced by the material in the direction of the loading force. It's calculated as the change in length divided by the original length of the material. This unitless ratio...
1.4K
01:18Stress Concentrations in Circular Shafts
623
Consider the elastic torsion formula, which applies to a circular shaft with a consistent cross-section. This formula assumes that the shaft's ends are loaded with rigid plates firmly attached. However, in many cases, torques are applied to the shaft through mechanisms like flange couplings or gears, which are connected by keys inserted into keyways. This application method modifies the stress distribution near the point of torque application, causing it to deviate from the distributions...
623