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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 gamma-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.
T Murakami, and
H Higaki, and
Y Sawae, and
N Ohtsuki, and
S Moriyama, and
Y Nakanishi
February 1963,
Nature,
T Murakami, and
H Higaki, and
Y Sawae, and
N Ohtsuki, and
S Moriyama, and
Y Nakanishi
January 1973,
Acta orthopaedica Belgica,
T Murakami, and
H Higaki, and
Y Sawae, and
N Ohtsuki, and
S Moriyama, and
Y Nakanishi
May 1972,
The Journal of physiology,
T Murakami, and
H Higaki, and
Y Sawae, and
N Ohtsuki, and
S Moriyama, and
Y Nakanishi
January 1975,
CRC critical reviews in bioengineering,
T Murakami, and
H Higaki, and
Y Sawae, and
N Ohtsuki, and
S Moriyama, and
Y Nakanishi
March 2000,
The Journal of rheumatology,
T Murakami, and
H Higaki, and
Y Sawae, and
N Ohtsuki, and
S Moriyama, and
Y Nakanishi
January 2012,
Faraday discussions,
T Murakami, and
H Higaki, and
Y Sawae, and
N Ohtsuki, and
S Moriyama, and
Y Nakanishi
January 1983,
Nihon Seikeigeka Gakkai zasshi,
T Murakami, and
H Higaki, and
Y Sawae, and
N Ohtsuki, and
S Moriyama, and
Y Nakanishi
April 1986,
Engineering in medicine,
T Murakami, and
H Higaki, and
Y Sawae, and
N Ohtsuki, and
S Moriyama, and
Y Nakanishi
December 2001,
Sheng wu yi xue gong cheng xue za zhi = Journal of biomedical engineering = Shengwu yixue gongchengxue zazhi,
T Murakami, and
H Higaki, and
Y Sawae, and
N Ohtsuki, and
S Moriyama, and
Y Nakanishi
September 1963,
The Journal of bone and joint surgery. American volume,
