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Implant Retrieval Analysis of Bilateral Hip Resurfacings Obtained at AutopsyA Case Report
Sherwin Azad, BS1; Nicholas Charles, BS1; Pat Campbell, PhD1; Harlan C. Amstutz, MD2
1 J. Vernon Luck Sr., MD, Orthopaedic Research Center at Los Angeles Orthopaedic Hospital, 2400 S. Flower Street, Los Angeles CA 90007. E-mail address for P. Campbell: pcampbell@mednet.ucla.edu
2 Joint Replacement Institute, St. Vincent Medical Center, 2131 W. 3rd Street, Los Angeles, CA 90057
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Investigation performed at the J. Vernon Luck Sr., MD, Orthopaedic Research Center at Los Angeles Orthopaedic Hospital, Los Angeles, California



Disclosure: One or more of the authors received payments or services, either directly or indirectly (i.e., via his or her institution), from a third party in support of an aspect of this work. In addition, one or more of the authors, or his or her institution, has had a financial relationship, in the thirty-six months prior to submission of this work, with an entity in the biomedical arena that could be perceived to influence or have the potential to influence what is written in this work. No author has had any other relationships, or has engaged in any other activities, that could be perceived to influence or have the potential to influence what is written in this work. The complete Disclosures of Potential Conflicts of Interest submitted by authors are always provided with the online version of the article.

Copyright © 2013 by The Journal of Bone and Joint Surgery, Inc.
JBJS Case Connector, 2013 May 22;3(2):e51 1-7. doi: 10.2106/JBJS.CC.L.00245
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Extract

Hip resurfacing arthroplasty with use of metal-on-metal bearings and hybrid fixation (femoral cement and acetabular porous ingrowth) has been in clinical use for more than a decade. Although femoral neck fracture1,2, femoral or acetabular loosening3, and soft-tissue masses associated with high wear4,5 are known failure modes, long-term clinical results in men generally have been reported to be good6,7. Many metal-on-metal hip resurfacing arthroplasty failures occur within the first one or two years postoperatively, and there have been few long-term specimens available for analysis. This paper describes the analysis of bilateral hip resurfacings from a patient who donated the components as part of a Willed Joint Program at the senior author’s (H.C.A.) institution.
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    Accreditation Statement
    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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