Long-Term clinical results of patellofemoral arthroplasty for isolated patellofemoral osteoarthritis

Abstract

Objectives The aim of this study was to explore the clinical outcomes and long-term survival of patellofemoral arthroplasty in treatment of isolated patellofemoral osteoarthritis. Methods We retrospectively studied a total of 46 type Y-L-Q PFAs that were designed at our institution in 38 patients. Implant survivorship was analyzed with a follow-up of 18.9–29.6 years. Knee Society Score (KSS), Oxford Knee Score (OKS), and University of California Los Angeles activity scale (UCLA) were used to assess functional outcomes. Results The implant survivorship was 83.6% at 15 years, 76.8% at 20 years, and 59.4% at 25 years 14 PFAs in 12 patients were revised into total knee arthroplasty at 16.0 ± 6.7 years; 13 for progression of tibiofemoral osteoarthritis and one for polyethylene wear. The mean Knee Society Score objective scores and functional scores were 73.0 ± 17.5 (range, 49–95) and 56.4 ± 28.9 (range, 5–90), respectively. The mean Oxford Knee Score was 25.8 ± 11.5 (range, 8–44). Conclusion Type Y-L-Q patellofemoral arthroplasty can be an effective method for treating isolated patellofemoral osteoarthritis with satisfactory survival.

Robotic-assisted patellofemoral arthroplasty provides excellent implant survivorship and high patient satisfaction at mid-term follow-up

“…Furthermore, positioning errors may produce an improper force distribution over the implant, leading to adverse effects such as excessive wear of the patellar all-polyethylene component and aseptic loosening in both short and long-term [ 9 , 32 , 34 – 36 ]. Malposition emerges than as the main cause for implant revision along with OA progression [ 14 , 37 ].…”

Patellar malalignment: A common disorder associated with knee pain

“…An isolated PF arthroplasty or total knee arthroplasty may be indicated [ 79 , 80 ]. Clinicians should consider patient age, activity level, and surgical risks.…”