The influence of cartilage surface topography on fluid flow in the intra-articular gap

Yabin Wu and Stephen J. Ferguson

Computer Methods in Biomechanics and Biomedical Engineering, 2017, vol. 20, issue 3, 250-259

Abstract: Self-lubrication of a diarthrodial joint is largely attributed to interstitial fluid pressurisation. However, the retention of synovial fluid within the intra-articular gap may also contribute to lubrication. Fluid flow in the intra-articular gap between two micro-rough cartilage surfaces was simulated with a three-dimensional numerical model. Representative surface roughness parameters were incorporated and their relative influence on gap flow resistance was quantified. Resistance changes with decreasing gap height were explored. Cartilage surface micro-topography improves the retention of viscous synovial fluid in the gap, through increased resistance to tangential flow. Local asperity contact greatly increases resistance through tortuosity of the flow path.

Date: 2017
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DOI: 10.1080/10255842.2016.1215438

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