2015 ISAKOS Biennial Congress ePoster #1923

Isolated Patellofemoral Arthritis Treated with a Resurfacing Inlay Implant Outcomes at a Minimum Two Years Follow Up

Lisandro Carbó, MD, Bella Vista, buenos aires ARGENTINA
Carlos H. Yacuzzi, MD, Buenos Aires, BA ARGENTINA
Juan F. Astoul Bonorino, MD, Bella Vista, Buenos Aires ARGENTINA
Carlos H. Yacuzzi, MD, Buenos Aires, BA ARGENTINA
Juan José Deré, MD, Santa Fe, Santa Fe ARGENTINA
Matias Costa-Paz, MD, Buenos Aires ARGENTINA

Italian Hospital of Buenos Aires, Buenos Aires, Buenos Aires, ARGENTINA

FDA Status Cleared

Summary: The aim of this study is to evaluate the clinical and radiographic outcomes of a series of 22 patients with isolated patellofemoral arthritis treated with an anatomic inlay resurfacing implant with a mean follow-up of 29 months.

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Abstract:

Introduction

Isolated patellofemoral arthritis can de the source of great pain and disability. Non surgical procedures are the first line treatmetnt option. However, in cases of unsatisfactory clinical results, patellofemoral arthroplasty is one of the alternative surgical procedures.

The aim of this study is to evaluate the clinical and radiographic outcomes of a series of 22 patients with isolated patellofemoral arthritis treated with an anatomic inlay resurfacing implant with a mean follow-up of 29 months.

MATERIALS & METHODS
We presented a series of 22 active patients operated for severe patellofemoral arthritis between June 2010 and June 2012 Thirteen were women and nine were men, with an average age of 52 years old. The minimum follow-up was 2 years. All were treated with HemiCAP Wave Patellofemoral Inlay Resurfacing System ( Arhtrosurface, Franklin, MA, USA ). Patients were evaluated preoperarively and at a minimum of 2 years follow up. Clinical outcomes included Visual Analogue Scale (VAS), Lysholm score, the Knee Society Score (KSS), Evaluation of Kujala, Hospital Special Surgery (HSS) and a patellofemoral radiographic evaluation. We analized the postoperative complications.

Results

All patients were available for follow up. The pre/postoperative clinical results presented a siginificant improvement in VAS 7.7/2.5, Lysholm Score 34/84, KSS 41/77, Kujala score 32/76 and patellofemoral HSS 20/88. Eighty-seven per cent of the patients were either satisfied or very satisfied with the overall outcome. There were no radiographic signs of loosening. Three complications were recorded: one postoperative stiffness treated with a movilization under anesthesia; one patellofemoral instability treated with a proximal realignament and one implant revision to a total knee replacement due to tibio-femoral osteoarthritis progression.

Conclusion

Patellofemoral inlay resurfacing for Isolated patellofemoral arthritis is an effective and safe procedure with high level of patient´s satisfaction. No mechanical implant failure was seen at a minimum 2 years follow up. This innovative anatomic implant design appeared to be an alternative to the traditional patellofemoral prostheses with satisfactory clinical and mechanical outcomes.