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Patellofemoral joint replacement - Mean five year follow-up
Serajdin Ajnin1, Donald Buchanan1, James Arbuthnot1
1Good Hope Hospital, Heart of England NHS Foundation Trust, United Kingdom of Great Britain and Northern Ireland.
The Knee
|September 9, 2018
Summary
The Femoro Patella Vialli (FPV) prosthesis shows moderate midterm outcomes for patellofemoral arthroplasty. Careful patient selection is crucial to avoid revision surgery due to tibiofemoral osteoarthritis.
Area of Science:
- Orthopedic surgery
- Biomedical engineering
- Arthroplasty
Background:
- The Femoro Patella Vialli (FPV) is a widely used second-generation patellofemoral arthroplasty implant.
- It represents the second most common patellofemoral implant in the National Joint Registry of England and Wales.
- This study presents the first published mid-term outcome data for the FPV prosthesis.
Purpose of the Study:
- To evaluate the mid-term outcomes of the Femoro Patella Vialli (FPV) patellofemoral arthroplasty.
- To assess implant revision rates and functional scores following FPV implantation.
Main Methods:
- A retrospective review of patients who underwent patellofemoral arthroplasty with the FPV implant.
- Primary outcome: implant revision. Secondary outcomes: Oxford Knee Score (OKS) and Kujala score.
Main Results:
- 43 FPV prostheses were implanted in 32 patients with a mean follow-up of 65 months.
- Five knees (11.6%) required revision to total knee replacement due to progressive tibiofemoral osteoarthritis.
- Significant improvements were observed in mean OKS (18 to 29) and Kujala scores (35 to 58).
Conclusions:
- The FPV prosthesis demonstrates moderate mid-term outcomes in patellofemoral arthroplasty.
- Judicious patient selection is essential to identify isolated patellofemoral osteoarthritis and potentially delay total knee replacement.
- Progressive tibiofemoral osteoarthritis, often linked to chondral lesions in weight-bearing areas, was the primary cause of implant failure.
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