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Scientific Articles   |    
Comparison of Fixed and Mobile-Bearing Total Knee Arthroplasty at a Mean Follow-up of 116 Months
Alessandro Bistolfi, MD1; Giuseppe Massazza, MD1; Gwo-Chin Lee, MD2; Davide Deledda, MD1; Paola Berchialla, PhD1; Maurizio Crova, MD1
1 Department of Orthopedics and Traumatology, AO CTO/M. Adelaide Hospital, Via Gianfranco Zuretti 29,10126 Torino, Italy. E-mail address for A. Bistolfi: abistolfi@cittadellasalute.to.it. E-mail address for G. Massazza: giuseppe.massazza@unito.it. E-mail address for D. Deledda: davide.deledda@libero.it. E-mail address for P. Berchialla: paola.berchialla@unito.it. E-mail address for M. Crova: maurizio.crova@unito.it
2 University of Pennsylvania, 1 Cupp Pavilion, 39th and Market Streets, Philadelphia, PA 19104. E-mail address: gwo_chin_lee@hotmail.com
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Investigation performed at the Department of Orthopedics and Traumatology, AO CTO/M. Adelaide Hospital, Torino, Italy



Disclosure: None 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 any aspect of this work. 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.
J Bone Joint Surg Am, 2013 Jun 19;95(12):e83 1-7. doi: 10.2106/JBJS.L.00327
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Abstract

Background: 

The superiority of mobile-bearing total knee arthroplasty implants over fixed-bearing implants, or vice versa, is still debated.

Methods: 

A series of patients with similar clinical and radiographic characteristics were treated consecutively with 100 fixed-bearing followed by 100 rotating-platform implants. Patients underwent prospective clinical and radiographic evaluation.

Results: 

The mean duration of follow-up was 116 months (range, sixty-one to 144 months). Clinical, radiographic, and implant survival outcomes were compared. No significant differences between the mobile-bearing and fixed-bearing groups were found with respect to the clinical outcome or cumulative implant survival at the time of the latest follow-up. Three of the fixed-bearing implants and one of the rotating-platform implants had required revision surgery.

Conclusions: 

No differences between mobile-bearing and fixed-bearing designs were demonstrated at a mean of 116 months of follow-up.

Level of Evidence: 

Therapeutic Level II. See Instructions for 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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