On the Natural Lubrication of Synovial Joints: Normal and Degenerate
On the Natural Lubrication of Synovial Joints: Normal and Degenerate
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滑膜关节的自然润滑：正常和退化
DOI：
10.1115/1.3453003
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发表时间：
1977
期刊：
影响因子：
--
通讯作者：
V. Mow
中科院分区：
文献类型：
--
作者：
J. Mansour;V. Mow
与关节软骨功能相关的流体流动和质量运输机制是正常和病理滑膜关节的重要生物力学过程。使用不可压缩流体和线弹性固体的三层可渗透两相介质来模拟关节软骨的流动和变形行为。流体相相对于固相的相对运动的摩擦阻力由线性扩散耗散项给出。软骨下骨基质由弹性固体代表。选择关节软骨的三层模型是因为已知组织学、超微结构和生物力学的组织特性变化。计算的流场表明，对于正常健康关节软骨的材料特性，组织创建了自然润滑的表面。表面上的间质液的运动以循环方式进行，在移动表面负载的前半部分的前面和附近渗出，并在移动负载的后半部分的后面和附近吸入。健康组织的流场能够在关节表面维持一层液膜，而病理组织则不能。
Fluid flow and mass transport mechanisms associated with articular cartilage function are important biomechanical processes of normal and pathological synovial joints. A three-layer permeable, two-phase medium of an incompressible fluid and a linear elastic solid are used to model the flow and deformational behavior of articular cartilage. The frictional resistance of the relative motion of the fluid phase with respect to the solid phase is given by a linear diffusive dissipation term. The subchondral bony substrate is represented by an elastic solid. The three-layer model of articular cartilage is chosen because of the known histological, ultrastructural, and biomechanical variations of the tissue properties. The calculated flow field shows that for material properties of normal healthy articular cartilage the tissue creates a naturally lubricated surface. The movement of the interstitial fluid at the surface is circulatory in manner, being exuded in front and near the leading half of the moving surface load and imbibed behind and near the trailing half of the moving load. The flow fields of healthy tissues are capable of sustaining a film of fluid at the articular surface whereas pathological tissues cannot.