A theoretical solution for the frictionless rolling contact of cylindrical biphasic articular cartilage layers

Previous studies have shown that interstitial fluid pressurization plays an important role in the load support mechanism of articular cartilage under normal step loading

Gerard A. Ateshian

2002

Key concepts

Scholarcy highlights

  • Previous studies have shown that interstitial fluid pressurization plays an important role in the load support mechanism of articular cartilage under normal step loading
  • These studies have demonstrated that interstitial fluid pressurization decreases with time if the applied load is maintained constant
  • A theoretical solution is obtained for another common loading of articular cartilage, namely the contact of surfaces in rolling motion
  • As Rh increases to a physiological level, interstitial fluid pressurization may support more than 90% of the total applied load, shielding the solid matrix from high effective stresses and reducing matrix strains and deformation
  • The protective effect of interstitial fluid pressurization is observed to increase with increasing joint congruence; as the applied load is increased, a greater proportion of it is supported by the fluid
  • The protective stress-shielding effect of interstitial fluid pressurization may become less effective in diseased tissue, possibly setting a pathway for further tissue degeneration

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