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Fifteen-Year Survival and Osteolysis Associated with a Modular Posterior Stabilized Knee ReplacementA Concise Follow-up of a Previous Report*
Paul F. Lachiewicz, MD1; Elizabeth S. Soileau, BSN1
1 Department of Orthopaedic Surgery, University of North Carolina, 3151 Bioinformatics Building, CB 7055, Chapel Hill, NC 27514. E-mail address for P.F. Lachiewicz: paul_lachiewicz@hotmail.com
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Original Publication
Lachiewicz PF, Soileau ES. The rates of osteolysis and loosening associated with a modular posterior stabilized knee replacement. Results at five to fourteen years. J Bone Joint Surg Am. 2004;86:525-30.
Disclosure: The authors did not receive any outside funding or grants in support of their research for or preparation of this work. One of the authors is an unpaid consultant and a paid speaker for a commercial entity (Zimmer). Neither they nor a member of their immediate families received 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, division, center, clinical practice, or other charitable or nonprofit organization with which the authors, or a member of their immediate families, are affiliated or associated.
Investigation performed at the Department of Orthopaedic Surgery, University of North Carolina, Chapel Hill, North Carolina

The Journal of Bone and Joint Surgery, Inc.
J Bone Joint Surg Am, 2009 Jun 01;91(6):1419-1423. doi: 10.2106/JBJS.H.01351
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Abstract

Abstract: We report the results of a consecutive series of total knee arthroplasties with use of a modular posterior stabilized prosthesis after a mean follow-up of twelve years (range, ten to eighteen years). In the five years since the original publication of our study, two additional knees were revised; one was revised for aseptic loosening and one, for polyethylene wear with tibial osteolysis. With mechanical failure as an end point, the fifteen-year survival was 96.8%. With failure defined as any reoperation, the fifteen-year survival was 90.6%. Osteolysis occurred in eight of the 117 knees with a minimum ten-year follow-up. With the relatively small number of subjects, no significant association was identified between polyethylene thickness or sterilization method and osteolysis. A significant association was identified between younger patient age and osteolysis. We continue to routinely implant a similar modular posterior stabilized total knee prosthesis.

Level of Evidence: Therapeutic Level IV. See Instructions to Authors for a complete description of levels of evidence.

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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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