Artroplastia patelofemoral como tratamiento de artrosis patelofemoral aislada. Resultados a mediano plazo

Abstract

Introduction: gonarthrosis is characterized by joint pain and stiffness. A prevalence of 7.4% is reported in Ecuador; however, data on isolated patellofemoral osteoarthritis (IPFO) are unknown. Patellofemoral arthroplasty (PFA) is indicated as a definitive treatment for this pathology. It has proven to be a viable option for treating IPFO.

Objective: to determine the conversion rate to total knee arthroplasty and the clinical outcomes of PFA in the medium term.

Materials and methods: this retrospective study included 231 patients diagnosed with grade IV IPFO, with an average follow-up of 8 years. Joint replacement was performed via a medial parapatellar approach. The sample included 78% women and 22% men, with a mean age of 52.2 years. The WOMAC, Kujala, and FJS-12 functional scales were used for clinical evaluation to demonstrate medium-term results.

Results: the average preoperative value on the WOMAC scale was 92.14 points, and at 14 years, it was 8.40 points. On the Kujala scale, it was 52.92 points preoperatively and 95.00 points at 14 years. Finally, on the FJS-12 scale, it was 53.06 points preoperatively and 93.00 points at 14 years. The conversion rate to total knee arthroplasty was 3.4%.

Conclusions: patellofemoral arthroplasty is a recommendable procedure for the treatment of patellofemoral osteoarthritis, with excellent functional results and a low conversion rate to total knee arthroplasty.