Development of a Model for Testing Third Body Wear of UHMWPE Acetabular Components

    Volume 1, Issue 1 (January 2004)

    ISSN: 1546-962X

    CODEN: JAIOAD

    Published Online: 5 January 2004

    Page Count: 7


    Bragdon, CR
    Orthopaedic Biomechanics and Biomaterials Laboratory, Massachusetts General Hospital, Boston, MA

    O'Connor, D
    Orthopaedic Biomechanics and Biomaterials Laboratory, Massachusetts General Hospital, Boston, MA

    Muratoglu, OK
    Orthopaedic Biomechanics and Biomaterials Laboratory, Massachusetts General Hospital, Boston, MA

    Harris, WH
    Orthopaedic Biomechanics and Biomaterials Laboratory, Massachusetts General Hospital, Boston, MA

    (Received 3 October 2002; accepted 2 May 2003)

    Abstract

    The purpose of this paper is to describe the development of a new wear test protocol utilizing third body particulate debris in order to assess conventional and highly cross-linked polyethylene components. A series of tests were performed using the Boston Hip Simulator to evaluate different types of particles for possible use. Modifications to the simulator are described which ensure that the third body particles can be maintained in suspension. In this series of studies, alumina particles in a concentration of 0.15mg/cc appeared to provide the most effective challenge to the wear resistance of UHMWPE while at the same time not creating unrealistic destruction to the femoral head. In all of the experiments, under all conditions, the WIAM highly crosslinked polyethylene acetabular components resisted the effects of the third body particles and the concomitant changes in the femoral heads distinctly better than the conventional UHMWPE.


    Paper ID: JAI11207

    DOI: 10.1520/JAI11207

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    Author
    Title Development of a Model for Testing Third Body Wear of UHMWPE Acetabular Components
    Symposium Crosslinked and Thermally Treated Ultra-High Molecular Weight Polyethylene for Joint Replacements, 2002-11-07
    Committee F04