Adaptive multimode lubrication in natural synovial joints and artificial joints

T. Murakami, H. Higaki, Yoshinori Sawae, N. Ohtsuki, S. Moriyama, Y. Nakanishi

研究成果: ジャーナルへの寄稿記事

119 引用 (Scopus)


To examine the lubrication mechanisms in both natural synovial joints and artificial joints with artificial cartilages, pendulum tests of pig shoulder joints and simulator tests of sliding pairs of a stainless steel spherical component and natural articular cartilage or artificial cartilage have been conducted. Firstly, it was shown in pendulum tests of pig shoulder joints that both concentration of hyaluronic acid or viscosity and adsorbed film formation of proteins and phospholipids exerted a significant effect on frictional behaviour in swinging motion immediately after a loading of 100 N. Under a high load of 1 kN, low friction was observed under wide-ranging viscosity conditions, since a high load similar to body weight probably enhanced the squeeze film effect due to improved congruity. Next, frictional behaviour of sliding pairs in knee joint models, consisting of a stainless steel spherical surface and either specimens of pig tibial cartilage or polyvinylalcohol (PVA) hydrogel, was examined during walking in simulator tests. In these tests, the influences of lubricant viscosity and addition of protein on frictional behaviour were evaluated. For both compliant materials, the appropriate addition of y-globulin to sodium hyaluronate (HA) solution maintained low friction and protected rubbing surfaces under thin film conditions. These phenomena are discussed from the viewpoint of adaptive multimode lubrication.

ジャーナルProceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine
出版物ステータス出版済み - 1 1 1998


All Science Journal Classification (ASJC) codes

  • Mechanical Engineering