Patellofemoral crepitation and clunk complicating posterior-stabilized total knee arthroplasty

Patellofemoral crepitation and clunk (PCC) is an important potential complication of total knee arthroplasty. Numerous factors, including implant design, range of motion, and certain radiographic parameters, may contribute to the development of PCC. Although the diagnosis is primarily clinical, imaging modalities may be helpful in cases of diagnostic uncertainty. Arthroscopic débridement is the preferred method of treating PCC in patients whose symptoms require intervention. A full understanding of the diagnosis, management, and prevention of PCC is essential for orthopedic surgeons who perform total knee arthroplasties.