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The Journal of Bone and Joint Surgery (American) 83:S27-31 (2001)
© 2001 The Journal of Bone and Joint Surgery, Inc.

Scientific Article

New Polys for Old: Contribution or Caveat?

A. Seth Greenwald, DPhil(Oxon), Thomas W. Bauer, MD, PhD and Michael D. Ries, MD Committee on Biomedical Engineering and the Committee on Hip and Knee Arthritis

A. Seth Greenwald, DPhil(Oxon)
Orthopaedic Research Laboratories, Lutheran Hospital, Cleveland Clinic Health System, 1730 West 25th Street, Cleveland, OH 44113. E-mail address: seth@orl-inc.com

Thomas W. Bauer, MD, PhD
Department of Pathology, Cleveland Clinic Foundation, 9500 Euclid Avenue, L25, Cleveland, OH 44195

Michael D. Ries, MD
University of California San Francisco Medical Center, 500 Parnassus Avenue, MU 320-W, San Francisco, CA 94143

The authors did not receive grants or outside funding in support of their research or preparation of this manuscript. They did not receive payments or other benefits or a commitment or agreement to provide such benefits from a commercial entity. No commercial entity paid or directed, or agreed to pay or direct, any benefits to any research fund, foundation, educational institution, or other charitable or nonprofit organization with which the authors are affiliated or associated.

The first 150 words of the full text of this article appear below.


   A Reality Check
 
The enduring success of the low-friction arthroplasty first advanced by Sir John Charnley as a solution for severe hip arthritic problems may be appreciated from the fact that in 1999 more than 500,000 hip and knee arthroplasties were performed in the United States. The prevalence of aseptic loosening attributed to polyethylene debris-induced osteolysis has been in the single digits in most contemporary series, with some reports describing prostheses surviving for twenty to thirty years (Figs. 1-A and 1-B).


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  		Fig. 1-A: Radiographs of a Charnley cemented hip replacement, made immediately postoperatively (Fig. 1-A) and twenty-five years postoperatively (Fig. 1-B).

 

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  		Fig. 1-B: Radiographs of a Charnley cemented hip replacement, made immediately postoperatively (Fig. 1-A) and twenty-five years postoperatively (Fig. 1-B).

 
Until recently, gamma irradiation in air has been the predominant method of sterilization of ultra-high molecular weight polyethylene components and, despite current concerns, it represents the only gold standard against which contemporary material improvements . . . [Full Text of this Article]


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