Computational Wear Prediction of UHMWPE in Knee Replacements

    Volume 3, Issue 7 (July 2006)

    ISSN: 1546-962X

    CODEN: JAIOAD

    Page Count: 6


    Zhao, D
    University of Florida, Gainesville, FL

    Gregory Sawyer, W
    University of Florida, Gainesville, FL

    Fregly, BJ
    University of Florida, Gainesville, FL

    (Received 18 October 2005; accepted 10 April 2006)

    Abstract

    A multibody dynamic contact model predicted the damage sustained by two tibial inserts tested under different conditions on an AMTI knee simulator machine. The model required a wear factor of 7.7 × 10−7 mm3/Nm to match the wear volume measured from the first insert after 0.86 million cycles of simulated gait. The model matched the medial and lateral damage depths measured from the second insert to within 0.3 mm after 5 million cycles of simulated gait and stair (10:1 ratio). Computational models may be valuable for screening new knee implant designs rapidly and performing sensitivity studies of component positioning issues.


    Paper ID: JAI100259

    DOI: 10.1520/JAI100259

    ASTM International is a member of CrossRef.

    Author
    Title Computational Wear Prediction of UHMWPE in Knee Replacements
    Symposium Wear of Articulating Surfaces, 2005-10-11
    Committee F04