肌骨的机械微环境受到生理步行负荷的影响
Yan Wang1, Heming Chen1, Baopeng Wu1
1Biomechanics Laboratory, School of Biological Science & Medical Engineering, Southeast University, Nanjing, 210096, PR China.
Annals of biomedical engineering
|November 25, 2025
概括
走路期间的椎骨应变和壁剪压力 (WSS) 与骨体积分数 (BV/TV) 相对应. 较低的BV/TV意味着较少的机械刺激,可能会影响骨质疏松症的发展.
科学领域:
- 生物力学 生物力学
- 骨生理学 骨生理学
- 计算机建模 计算建模
背景情况:
- 了解椎骨的机械微环境对于骨健康至关重要.
- 脊椎骨的机械特性受其结构的影响,其量化为骨体积分数 (BV/TV).
- 步行负荷诱导骨组织内复杂的机械信号.
研究的目的:
- 在步行过程中在椎骨中表征机械信号 (应变和壁切削应力 - - WSS).
- 研究这些机械信号与骨体积分数 (BV/TV) 之间的关系.
- 为了探索带骨微环境中应变和WSS之间的相关性.
主要方法:
- 微计算机断层扫描 (micro-CT) 用于重建40个带骨骨块,具有不同的BV/TV.
- 进行了流体结构相互作用分析,使用基于富里叶数列的步态负载曲线.
- 分析了菌株,WSS和BV/TV之间的相关性.
主要成果:
- 应变和WSS在步态周期中显示了交替的峰值模式.
- 菌株和WSS都与BV/TV有很强的相关性,较低的BV/TV导致较低的信号.
- 菌株和WSS之间的相关性与BV/TV有所不同:在低BV/TV时弱,在高BV/TV时强.
结论:
- 减少骨结构和机械刺激之间的相互作用可能导致骨质疏松症.
- 描述的机械微环境为体外机械生物学研究提供了洞察力.
- 这些发现为了解骨适应性重塑提供了一个重要线索.
更多相关视频
相关概念视频
01:09Spongy Bone
7.5K
All bones comprise an outer layer of compact bone, and an interior made up of spongy bone tissue, also called cancellous or trabecular bone. In long bones, spongy bone tissue is mainly found in the interior of the epiphyses (broad ends of the bone).
Spongy bone is more porous, and less dense compared to compact bone. It is composed of concentric lamellae that are arranged irregularly to form the trabecular network. In some bones, the spaces between trabeculae contain red marrow, where...
Spongy bone is more porous, and less dense compared to compact bone. It is composed of concentric lamellae that are arranged irregularly to form the trabecular network. In some bones, the spaces between trabeculae contain red marrow, where...
7.5K
01:40Bone Remodeling
40.2K
Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
40.2K