Abstract
In this paper, the wear in layers of articular cartilage was calculated, parameters effective on elastic deformation were studied in normal and diseased knee joints, and relations between elastic deformation and squeeze film characteristics under lubrication condition were discussed with using a mathematical model. Conferring to the results obtained, elastic deformation effects on the performance of synovial human knee joint were analyzed from medical and dynamics perspectives. Relationships between elastic deformation and wear of layers were also discussed.
Highlights
The knee joint is one of the most significant joints in the human body
On the basis of quasi-static squeeze film equations, this paper discusses the effectiveness of elastic deformation of articular cartilage on squeeze film characteristics in synovial human knee joint in the cases of normal and disease joint
It is observed that when elastic deformation is small, it implies that the hydrodynamic pressure between the articular cartilages is very high
Summary
The knee joint is one of the most significant joints in the human body. It allows us to walk, run, and jump. The primary function of the articular cartilage is to serve as the bearing material in the diarthrodial joint, transmitting loads while minimizing friction and wear .The friction coefficient of cartilage has been characterized extensively in the literature ,using standard measurements of normal and tangential forces action across a sliding interface. Increasing elastic deformation forms to protect the cartilage layers and reduce damage and early injury arthritis [6]. Previous studies indicated that corrosion is a result of the increase of friction and the reduction of elasticity. With time, it turns to wear damage the articular cartilage, where the rate of wear increases after 45 years of age. Several factors affect the increase of wear, including age, sex and work
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