Influence of dynamic load on friction behavior of human articular cartilage, stainless steel and polyvinyl alcohol hydrogel as artificial cartilage
Influence of dynamic load on friction behavior of human articular cartilage, stainless steel and polyvinyl alcohol hydrogel as artificial cartilage
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DOI：
10.1007/s10856-009-3863-5
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发表时间：
2010-01-01
影响因子：
3.7
通讯作者：
Wang, Chengtao
中科院分区：
文献类型：
--
作者：
Li, Feng;Su, Yonglin;Wang, Chengtao
许多生物材料正在被开发用于软骨替代和半关节置换植入物。润滑性能是人工软骨的一个关键特征。采用销-板法研究了人关节软骨、不锈钢和聚乙烯醇（PVA）水凝胶在软骨-PVA水凝胶接触、软骨-软骨接触和软骨-不锈钢接触下的摩擦性能。在静载荷、循环载荷和1 min载荷变化下的试验用于评估往复运动中的摩擦变化。结果表明，软骨-PVA水凝胶接触和软骨-不锈钢接触的润滑性能在1 min载荷变化和循环载荷试验中均得到恢复。PVA水凝胶的摩擦系数在60 min内从0.178下降到0.076，约为静载荷下的三分之一。在每次测试中，软骨-软骨接触的摩擦系数保持远低于其他接触的值。研究表明，人工软骨的一个重要特征是其两相润滑特性。
Many biomaterials are being developed to be used for cartilage substitution and hemiarthroplasty implants. The lubrication property is a key feature of the artificial cartilage. The frictional behavior of human articular cartilage, stainless steel and polyvinyl alcohol (PVA) hydrogel were investigated under cartilage-on-PVA hydrogel contact, cartilage-on-cartilage contact and cartilage-on-stainless steel contact using pin-on-plate method. Tests under static load, cyclic load and 1 min load change were used to evaluate friction variations in reciprocating motion. The results showed that the lubrication property of cartilage-on-PVA hydrogel contact and cartilage-on-stainless steel contact were restored in both 1 min load change and cyclic load tests. The friction coefficient of PVA hydrogel decreased from 0.178 to 0.076 in 60 min, which was almost one-third of the value under static load in continuous sliding tests. In each test, the friction coefficient of cartilage-on-cartilage contact maintained far lower value than other contacts. It is indicated that a key feature of artificial cartilage is the biphasic lubrication properties.