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

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

Jeong, Jae-Heon et al.

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.

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