Maine Orthopaedic Review Monthly Challenge

Test Your Knowledge of Treating Patients After Total Knee Arthroplasty

Bruce F. Gomberg, MD


November 03, 2017

Patellar clunk syndrome causes pain and an audible clunk during knee extension and is caused by suprapatellar soft tissue catching on the femoral flange or box during this motion. It is often related to design of the prosthesis, more often seen in posterior stabilized designs. Recent design changes, such as longer trochlear groove and more anatomical femoral components, and intraoperative attention to removing synovium proximal to the patella lead to a decrease in the incidence. Effective treatment is debridement of the offending tissue.[1,2]


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