2025 ISAKOS Biennial Congress ePoster
OCCURRENCE OF PATELLOFEMORAL OSTEOARTHRITIS AT MEDIUM AND LONG-TERMS AFTER ISOLATED RECONSTRUCTION OF THE MEDIAL PATELLOFEMORAL LIGAMENT WITH MEDIAL THIRD OF THE PATELLAR TENDON
Fabiano Kupczik, MD, PhD, MSc, Curitiba, Parana BRAZIL
Marlus Eduardo Gunia Schiavon, Curitiba, Parana BRAZIL
Bruno Sbrissia, MD, Curitiba, Parana BRAZIL
Marvin Durante Brunet, MD, Curitiba, Paraná BRAZIL
Riccardo Gomes Gobbi, MD, PhD, São Paulo, SP BRAZIL
Cajuru University Hospital - PUCPR, Curitiba, Paraná, BRAZIL
FDA Status Not Applicable
Summary
Isolated MPFL reconstruction with medial third of the patellar tendon showed a low rate of patellofemoral OA in the medium and long-terms follow-up. The presence of high-grade trochlear dysplasia did correlate to patellofemoral OA development.
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Abstract
Objective
The purpose of this study was to analyze the presence of patellofemo-ral osteoarthritis (OA) in the medium and long-terms in patients underwent medial patellofemoral ligament (MPFL) reconstruction with medial third of the patellar tendon to treat recurrent patellar instability.
Methods
This case series included 69 patients (86 knees) who underwent medi-al MPFL reconstruction between 2004 and 2016, mean age 26.1 ± 8 years (15 to 45 years). Data were recorded at a mean follow-up of 72.2 ± 37.5 months (24 to 163 months). Parameters evaluated: age, sex, follow-up period, recurrence, pre-existing chondral lesion. Standardized X-rays images were used to evaluate trochlear dysplasia (Dejour's classification), patellar height, femoral tunnel positioning and patellofemoral OA (Iwano’s classification). Uni and multivariate analysis correlated the variables to patellofemoral OA.
Results
There was patellofemoral OA in only 16.3% of cases (grade 1: 11.6%; grade 2: 3.5%; grade 3: 1.2%, grade 4: none). Univariate analysis showed that only the follow-up period had an independent association with patellofemoral OA (p = 0.028) and multivariate analysis showed that only high-grade (B/C) of trochlear dysplasia had a significant correlation with the occurrence of patellofemoral OA (p = 0.004). There were no recurrences and there was no correlation between patellofemoral OA and the others variables.
Conclusion
Isolated MPFL reconstruction with medial strip of the patellar tendon showed a low rate of patellofemoral OA in the medium and long-term follow-up. The presence of high-grade trochlear dysplasia (B/C) did correlate to patellofemoral OA development.