The Journal of Arthroplasty
Volume 27, Issue 2 , Pages 323.e5-323.e7, February 2012

Incarceration of a Dislocated Mobile Bearing to the Popliteal Fossa After Unicompartmental Knee Arthroplasty

  • Jae-Heon Jeong, MD

      Affiliations

    • Department of Orthopaedic Surgery, Chung-Ang University College of Medicine, Seoul, South Korea
    • ,
  • Hyun Kang, MD

      Affiliations

    • Department of Anesthesiology, Chung-Ang University College of Medicine, Seoul, South Korea
    • ,
  • Yong-Chan Ha, MD

      Affiliations

    • Department of Orthopaedic Surgery, Chung-Ang University College of Medicine, Seoul, South Korea
    • Corresponding Author InformationReprint requests: Yong-Chan Ha, MD, Department of Orthopaedic Surgery, Chung-Ang University College of Medicine, 224-1 Heukseok-dong, Dongjak-ku, Seoul 156-755, South Korea.
    • ,
  • Eui-Chan Jang, MD

      Affiliations

    • Department of Orthopaedic Surgery, Chung-Ang University College of Medicine, Seoul, South Korea

Received 27 September 2010; accepted 4 March 2011. published online 18 April 2011.

Abstract 

The mobile meniscal bearing of unicompartmental knee arthroplasty is completely free moving, and dislocation of this bearing is a major concern for all mobile-bearing designs. Most dislocations are located in the intracapsular area; however, posterior dislocation of the polyethylene bearing to an extra-articular area of the knee after unicompartmental arthroplasty has not been previously reported. During a revision surgery, separate incision was necessary to remove a dislocated meniscal bearing in the popliteal fossa. The authors present a case of incarceration of a dislocated mobile bearing to the popliteal fossa after unicompartmental knee arthroplasty that was missed during initial diagnosis.

Keywords: unicompartmental knee arthroplasty, mobile bearing, dislocation

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 The Conflict Interest statement associated with this article can be found at doi:10.1016/j.arth.2010.03.017.

PII: S0883-5403(11)00116-1

doi:10.1016/j.arth.2011.03.017

The Journal of Arthroplasty
Volume 27, Issue 2 , Pages 323.e5-323.e7, February 2012

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