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The Journal of Bone and Joint Surgery 80:1242-43 (1998)
© 1998 The Journal of Bone and Joint Surgery, Inc.

Commentary

Response to Commentary*

R. POSS, M.D. and M. SPECTOR, PH.D.

Schmalzried et al. are correct in stating that multiple factors affect the rate of polyethylene wear. The purpose of our first report3 was to provide early information to the orthopaedic community regarding accelerated wear of Hylamer liners. After at least two years of clinical follow-up, we observed a rate of revision of 3 per cent (five) of the first 143 liners that we had implanted. (Another implant was scheduled to be revised at the time of a later follow-up.) Three of the five patients were more than fifty-nine years old, none was obese, and two had inflammatory arthritis (presumably with a reduced level of activity). One patient had a femoral implant fixed without cement (presumably indicating an increased level of activity).

In our recent investigation6, we . . . [Full Text of this Article]


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