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The Journal of Bone and Joint Surgery (American) 83:S80-86 (2001)
© 2001 The Journal of Bone and Joint Surgery, Inc.

Scientific Article

Wear Performance of Ultra-High Molecular Weight Polyethylene on Oxidized Zirconium Total Knee Femoral Components

Myron Spector, PhD, Michael D. Ries, MD, Robert B. Bourne, MD, Willard S. Sauer, MS, Marc Long, PhD and Gordon Hunter, PhD

Myron Spector, PhD
Department of Orthopaedic Surgery, Brigham and Women’s Hospital,
75 Francis Street, Boston, MA 02115. E-mail address:
mspector@rics.bwh.harvard.edu

Michael D. Ries, MD
Department of Orthopaedic Surgery, University of California, San Francisco,
500 Parnassus Avenue, Suite MU320W, San Francisco, CA 94143

Robert B. Bourne, MD
London Health Sciences Centre, University Campus, 339 WindermereRoad, London, ON N6A5A5, Canada

Willard S. Sauer, MS
Marc Long, PhD
Gordon Hunter, PhD
Orthopaedic Division, Smith and Nephew, Incorporated, 1450 Brooks Road, Memphis, TN 38116

In support of their research or preparation of this manuscript, one ormore of the authors received grants or outside funding from Smith andNephew. In addition, one or more of the authors received payments orother benefits or a commitment or agreement to provide such benefitsfrom a commercial entity (Smith and Nephew). Also, a commercialentity (Smith and Nephew) paid or directed, or agreed to pay or direct,benefits to a research fund, foundation, educational institution, or othercharitable or nonprofit organization with which the authors are affiliatedor associated.

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   Introduction
 
Wear debris can lead to osteolysis and aseptic loosening after total knee arthroplasty1,2. Efforts to reduce wear of total knee replacements have focused primarily on improving implant design and the quality of ultra-high molecular weight polyethylene. Although these efforts have addressed issues related to fatigue wear of the ultra-high molecular weight polyethylene component, concerns remain about adhesive and abrasive wear caused by the hard counterface of the femoral component. Previous studies have shown that roughening of the condyles occurs clinically and that many observed scratches have a shape and orientation that can increase polyethylene wear (Figs. 1, 2, and 3)3-8. Not only does volumetric wear of polyethylene increase with increasing counterface roughness, it also has been found that increasingly sharp peaks associated with counterface scratches increase the tendency for the production of submicrometer-sized debris that may be related to osteolysis9. These findings suggest . . . [Full Text of this Article]


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