在动态负载下对骨质体中间歇性流体流动行为的数值研究.
Tianyu Liu1, Baochuan Xiong1, Xin Cui1
1Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, School of Mechanical Engineering, Tianjin University of Technology, Tianjin, 300384, P.R. China.
BMC musculoskeletal disorders
|February 25, 2025
概括
动态机械负荷通过改变毛孔体积,显著增强骨的腔通道网络 (LCN) 流体流动. 这项研究揭示了负载如何影响流体运输,这对骨健康和组织工程至关重要.
科学领域:
- 生物机械工程 生物机械工程
- 细胞生物学 细胞生物学
- 材料科学 材料科学 材料科学
背景情况:
- 骨组织的多孔结构对细胞健康和功能至关重要.
- 沟-沟网络 (LCN) 通过间歇性流体流来促进营养和信号分子的运输.
- 在动态负载下,LCN内的流体流动力学还不清楚.
研究的目的:
- 为了研究在动态负载下LCN内的间歇性流体流动行为.
- 分析LCN孔积变化与流体速度/压力之间的关系.
- 了解不同加载频率和振幅对流体动力学的影响.
主要方法:
- 一个流体-固体合模型的哈弗斯运河,canaliculi, lacunae,和间歇性流体被开发.
- 该模型在动态负载条件下模拟了LCN内的间歇性流体流.
- 研究人员检查了不同加载频率和振幅对孔积,流体速度和压力的影响.
主要成果:
- 增加的应变幅度显著改变了LCN孔积,导致压缩时的收缩和卸载时的恢复.
- 较高的应变幅度和频率导致LCN内的间隙流体速度和压力梯度增加.
- 在2500 με负载振幅下,与1000 με相比,平均流速增加了2.14倍,而在1000 με时,速度随频率增加.
结论:
- 动态机械负载通过孔积调节来增强液体间位流在LCN中的流量.
- 与深空相比,负载在浅空隙中促进了较大的流体流动.
- 这些发现对药物输送和骨组织工程策略有影响.
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