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Clinical Issues   |    
Modern Metal-on-Metal Hip Resurfacing: Important Observations from the First Ten Years
Michael A. Mont, MD1; 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
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Disclosure: The authors did not receive any outside funding or grants in support of their research for or preparation of this work. One or more of the authors or a member of his or her immediate family received, in any one year, payments or other benefits in excess of $10,000 or a commitment or agreement to provide such benefits from a commercial entity (Wright Medical and DePuy). Also, a commercial entity (Wright Medical) paid or directed in any one year, or agreed to pay or direct, benefits in excess of $10,000 to a research fund, foundation, division, center, clinical practice, or other charitable or nonprofit organization with which one or more of the authors, or a member of his or her immediate family, is affiliated or associated.

The Journal of Bone and Joint Surgery, Inc.
J Bone Joint Surg Am, 2008 Aug 01;90(Supplement 3):3-11. doi: 10.2106/JBJS.H.00750
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Extract

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.
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    These activities have been planned and implemented in accordance with the Essential Areas and policies of the Accreditation Council for Continuing Medical Education (ACCME) through the joint sponsorship of the American Academy of Orthopaedic Surgeons and The Journal of Bone and Joint Surgery, Inc. The American Academy of Orthopaedic Surgeons is accredited by the ACCME to provide continuing medical education for physicians.
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