The Journal of Bone and Joint Surgery (American). 2008;90:3-11.
doi:10.2106/JBJS.H.00750
© 2008 The Journal of Bone and Joint Surgery, Inc.
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Modern Metal-on-Metal Hip Resurfacing: Important Observations from the First Ten Years

Michael A. Mont, MD1 and Thomas P. Schmalzried, MD2

1 Center for Joint Preservation and Replacement, Rubin Institute for Advanced Orthopaedics, Sinai Hospital of Baltimore, 2401 West Belvedere Avenue, Baltimore, MD 21215. E-mail address: mmont@lifebridgehealth.org
2 Joint Replacement Institute, 2200 West Third Street, Suite 400, Los Angeles, CA 90057

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


   Introduction
 
Total hip resurfacing, in which a cementless acetabular component is combined with a metal-on-metal (cobalt-chromium alloy) bearing, was introduced approximately ten years ago. Previous resurfacing devices had failed because of insufficient initial fixation or as a result of progressive inflammatory bone resorption (osteolysis) due to high volumetric wear of the large-diameter acetabular bearing, which is composed of conventional polyethylene1,2. Extensive pelvic bone loss often made for a challenging revision.

Current-generation cementless monoblock metal-on-metal bearing acetabular components are thin shelled (<5 mm). The amount of acetabular bone removed is no greater than that which would be removed during standard total hip arthroplasty. The cementless fixation principles that apply to the placement of these components are the same as those established over the past twenty years for the placement of standard total hip prostheses. Extensive wear simulation testing by numerous investigators has proven that the combination of high carbon content, low . . . [Full Text of this Article]


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