ch8_wear

1 10 shear stress pa d mazzucco et al j orthop res

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Unformatted text preview: Res. 2002;20:1157 Page 16 WEAR PROCESSES Boundary Layer Lubrication Joint Fluid Metal z PE Boundary Layer Lubrication; protein and lipid adsorb to the surfaces to decrease friction and reduce adhesive wear; can contribute to reducing abrasive and fatigue wear Protein Lipid WEAR PROCESSES Boundary Layer Lubrication Joint Fluid Metal z PE Boundary Layer Lubrication; Determine the protein and lipid content of the joint fluid; employ a metal counterface that will best adsorb the lipid and protein; Oxinium Page 17 Protein Lipid LUBRICATION OF THE NATURAL LUBRICATION AND ARTIFICIAL JOINT • • • • Composition Amount of fluid Rate of turnover Mechanical properties Wear testing of a total knee replacement prosthesis in a “knee simulator.” Photos removed due to copyright restrictions. Page 18 ROLE OF SYNOVIAL FLUID IN THE ROLE LUBRICATION OF ARTIFICIAL JOINTS • How do the amount, composition and mechanical properties of synovial fluid affect the performance of total joint replacements? • What is the mechanism of lubrication of artificial...
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