Study of Knee Replacements for Patellofemoral Osteoarthritis

Patellofemoral Arthroplasty (PFA) Versus Total Knee Replacement (TKR) for Isolated Patellofemoral Osteoarthritis

This is a randomized comparison of PFA and TKR in treatment of isolated patellofemoral osteoarthritis.

Isolated patellofemoral osteoarthritis can be a disabling condition of the knee necessitating knee arthroplasty. It is debated whether total knee replacement or isolated patellofemoral replacement is the better treatment option. This randomized trial attempts to give a qualified answer to the debate by comparing clinical outcome (range of movement, stability, effusion, patellofemoral tracking, tenderness, stair climbing), patient self assessment scores (EQ-5D, Oxford Knee Score, KOOS, SF-36, AKS), complications (infections, revisions), longevity (survival analysis) and cost (direct and indirect) for the two implant types.

The Avon patellofemoral implant has been chosen, as this is the patellofemoral implant with the best documentation. The PFC Sigma CR total knee implant has been chosen as it a current standard implant and market leader.

Inclusion Criteria:

• Isolated PF-OA

Exclusion Criteria:

• Medial or lateral OA