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    J Bone Joint Surg Br. 1992 Jan;74(1):18-22.

    Polyethylene wear in uncemented knee replacements.

    Source

    Freeman Hospital, Newcastle upon Tyne, England.

    Abstract

    Isolated wear of the polyethylene tibial component led to failure in five of a series of 108 uncemented porous-coated knee replacements. The clinical features included pain, effusion and instability with progressive varus deformity. In all cases there was extensive wear on the medial side of the polyethylene surface of the prosthesis. The mechanism of such wear is complex, being due in part to the unconstrained nature of the joint and the incongruity of its surfaces. Other design characteristics may have contributed.

    PMID:
    1732256
    [PubMed - indexed for MEDLINE]
    Free full text

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