Pre-stress in articular cartilage due to internal swelling pressure

The triphasic theory has been used to calculate the pre-stress in spherical and cylindrical layer models of articular cartilage. In the present study, cartilage was assumed to be homogeneous with a uniform fixed charge density. The tissue is attached to subchondral bone of a given radius of curvature. It has been determined that: 1) the maximum radial elastic stress occurs at the cartilage-bone junction and the maximum circumferential elastic stress occurs at the cartilage surface; 2) radial elastic stress is generally larger than the tangential elastic stress; 3) the maximum elastic stress increases with decreasing radius of curvature for cartilage layers of fixed thickness. The existence of pre-stresses may serve to reduce collagen tension resulting from joint loading, and may also be an important factor in determining the collagen ultrastructure within the cartilage solid matrix.

Duke Authors

Cited Authors

  • Setton, LA; Gu, WY; Lai, WM; Mow, VC

Published Date

  • 1992

Published In

  • American Society of Mechanical Engineers, Bioengineering Division (Publication) BED

Volume / Issue

  • 22 /

Start / End Page

  • 485 - 488

Citation Source

  • SciVal