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
View Disclosures and Other Information
  • Disclosure statement for author(s): PDF

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
5 Recommendations (Recommend) | 3 Comments | Saved by 3 Users Save Case



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


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.


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.


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.

Figures in this Article
    Sign In to Your Personal ProfileSign In To Access Full Content
    Not a Subscriber?
    Get online access for 30 days for $35
    New to JBJS?
    Sign up for a full subscription to both the print and online editions
    Register for a FREE limited account to get full access to all CME activities, to comment on public articles, or to sign up for alerts.
    Register for a FREE limited account to get full access to all CME activities
    Have a subscription to the print edition?
    Current subscribers to The Journal of Bone & Joint Surgery in either the print or quarterly DVD formats receive free online access to JBJS.org.
    Forgot your password?
    Enter your username and email address. We'll send you a reminder to the email address on record.

    Forgot your username or need assistance? Please contact customer service at subs@jbjs.org. If your access is provided
    by your institution, please contact you librarian or administrator for username and password information. Institutional
    administrators, to reset your institution's master username or password, please contact subs@jbjs.org


    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.
    CME Activities Associated with This Article
    Submit a Comment
    Please read the other comments before you post yours. Contributors must reveal any conflict of interest.
    Comments are moderated and will appear on the site at the discretion of JBJS editorial staff.

    * = Required Field
    (if multiple authors, separate names by comma)
    Example: John Doe

    Related Content
    The Journal of Bone & Joint Surgery
    JBJS Case Connector
    Topic Collections
    Related Audio and Videos
    Clinical Trials
    Readers of This Also Read...
    JBJS Jobs
    Massachusetts - UMass Memorial Medical Center
    Oregon - The Center - Orthopedic and Neurosurgical Care and Research