Abstract
Background
Patellofemoral replacement is an established intervention in selected patients with severe isolated patellofemoral osteoarthritis. FPV (Wright Medical, UK) is a third generation patellofemoral arthroplasty implant and is the second most used after AVON in National Joint Registry for England and Wales. Reports of survivorship and functional of this implant are scarce in literature.
Aim
Evaluation of functional outcome and survivorship following FPV patellofemoral arthroplasty.
Methods
FPV patellofemoral arthroplasties performed by multiple surgeons in a teaching hospital between 2004- 2008 were followed up (mean 3.5 years) with radiographs and functional outcome scores (Oxford Knee Score, Kujala score and Fulkerson score) and survival analysis was performed.
Results
One hundred consecutive FPV patellofemoral joint arthroplasties were performed during this period in 81 patients (70 female). The mean age at the time of the surgery was 62 years (Range 44-82 years). Latest functional outcome was Oxford Knee Score (mean 29 out of 48), Kujala score (mean54 out of 100) and Fulkerson score (mean 65 out of 100). Three patients were lost to follow up due to death, none of these had been revised. There were 14 revisions, twelve of which were converted to total knee replacement and two revised to further FPV. The cumulative five year survival analysis was 84.1%.
Conclusion
Although inferior to total knee replacement results, the results from our study are comparable to those in the national joint registry. FPV patellofemoral arthroplasty gives satisfactory initial results and can be considered as a bone ligament sparing option in patients with isolated patellofemoral arthritis which can be readily be revised to total knee replacement if necessary.
