STP1365

    Residual Abrasive Material from Surface Grinding of Metal-Metal Hip Implants: A Source of Third-Body Wear?

    Published: Jan 1999


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    Abstract

    The surfaces of fifteen heads of all metal hip implants were investigated using a scanning electron microscope. The heads were manufactured from Co-Cr-Mo alloy, either cast, low carbon wrought or high carbon wrought. Six of the surfaces were investigated prior to hip simulator testing, three after 3 million cycles of simulator testing and six after 6 million cycles of testing. Third-body wear type scratches of varying amounts were observed on all fifteen heads. Residual grinding stone material from the manufacturing process was also found at varying amounts on the surfaces of all fifteen heads. There was a correlation between the extent of this residual material and the extent to which the surfaces were scratched.

    Keywords:

    hip implant, metal-on-metal, articulating surface


    Author Information:

    Wang, A
    B.Eng. (M.Eng. candidate) & Associate Professor, McGill University, Montreal, Quebec

    Bobyn, JD
    Associate Professor & M.Eng. (Ph.D. candidate), Jo Miller Orthopaedic Research Laboratory, Montreal, Quebec

    Yue, S
    B.Eng. (M.Eng. candidate) & Associate Professor, McGill University, Montreal, Quebec

    Medley, JB
    Associate Professor, University of Waterloo, Waterloo, Ontario

    Chan, FW
    Associate Professor & M.Eng. (Ph.D. candidate), Jo Miller Orthopaedic Research Laboratory, Montreal, Quebec


    Paper ID: STP14268S

    Committee/Subcommittee: F04.93

    DOI: 10.1520/STP14268S


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