Dislocation of the mobile bearing component of a patellofemoral arthroplasty : A report of two cases


Published online: Jun 27 2009

Suzanne Witjes, Chris Van Den Broek, Sander Koëter, Corné Van Loon

From Rijnstate Hospital, Arnhem, The Netherlands

Abstract

Isolated degenerative osteoarthritis of the patellofemoral joint can be treated with a patellofemoral arthroplasty. Improvements in patellar resurfacing designs have resulted in diminished complication rates. We describe two cases of dislocation of the polyethylene bearing, which is an unusual complication of a mobile bearing metal-backed patellar component of a patellofemoral arthroplasty.

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