Abstract
Friction and wear are caused by complex interactions between surfaces that are in mechanical contact and sliding against each other. The goal of this study was to determine the effect of different lubricants on the wear and friction of most commonly used implant material ultrahigh molecular weight polyethylene (UHMWPE), and to compare the results of UHMWPE with another materials polytetrafluoroethylene (PTFE). To accomplish this goal, pin-on-disk cyclic testing by AMTI Ortho-Pod pin on disk was used with lubricant. The lubricant used to mimic synovial fluid was bovine albumin, hyaluronic acid, and the artificial lubricant (silicone oil) were used. Gravimetric analysis was used to characterize wear after 700 thousand cycles at normal load 300 N, sliding velocity 87.92 mm/sec with different wear paths. Using these data, pin-on-disk wear tests were conducted to explore that circular path had a higher mean coefficient of frictions and specific wear rate than a line path. UHMWPE had a lower mean coefficient of frictions and specific wear rate than PTFE.
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