Polyethylene wear in uncemented knee replacements

Author:

Jones SM1,Pinder IM1,Moran CG1,Malcolm AJ1

Affiliation:

1. 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.

Publisher

British Editorial Society of Bone & Joint Surgery

Subject

Orthopedics and Sports Medicine,Surgery

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