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The Journal of Bone and Joint Surgery, Vol 59, Issue 8 1026-1032, Copyright © 1977 by Journal of Bone and Joint Surgery, Inc

JOURNAL CONTENTS

Herbert total knee prosthesis: combined laboratory and clinical assessment

DG Murray, AH Wilde, F Werner and D Foster

We tested the Herbert knee prosthesis, which was designed to restore intrinsic stability with limited degrees of freedom for rotation to severely damaged or deformed knees, in a knee simulator. These tests indicated a tendency for the prosthesis to fracture through the medial femoral housing after cycling for the equivalent of one to three years of normal use. In a clinical series of thirty-five knees treated with the prosthesis, there were five failures similar to those produced by laboratory testing. On the basis of this combined study, the Herbert prosthesis appears to have design characteristics that seriously limit its usefulness for long-term knee replacement. Testing in a knee simulator in this case appeared to be a valid predictor of clinical failure.
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