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Published in: Knee Surgery, Sports Traumatology, Arthroscopy 7/2023

16-11-2022 | KNEE

Patellofemoral articular cartilage damage is associated with poorer patient-reported outcomes following isolated medial patellofemoral ligament reconstruction

Authors: Roberto C. Gonzalez, David J. Ryskamp, Steven D. Swinehart, Parker A. Cavendish, Eric Milliron, Alex C. DiBartola, Robert A. Duerr, David C. Flanigan, Robert A. Magnussen

Published in: Knee Surgery, Sports Traumatology, Arthroscopy | Issue 7/2023

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Abstract

Purpose

The purpose of this study was to investigate the impact of articular cartilage damage on outcomes following medial patellofemoral ligament (MPFL) reconstruction.

Methods

Record review identified 160 patients who underwent isolated MPFL reconstruction at a single institution between 2008 and 2016. Patient demographics, patellofemoral articular cartilage status at surgery, and patient anatomical measures from imaging were obtained via chart review. Patients were contacted and outcomes assessed through collection of Norwich Patellar Instability (NPI) score, Knee injury and Osteoarthritis Outcome Score (KOOS), and Marx activity score as well as an assessment for recurrent patellar dislocation. Outcomes of patients with grade 0–II patellofemoral cartilage damage were compared to those of patients with grade III–IV cartilage damage.

Results

One hundred twenty-two patients (76%) with a minimum of one year follow-up were contacted at a mean of 4.8 years post-operatively. A total of 63 patients (52%) had grade III or IV patellofemoral chondral damage at the time of surgery. The majority of the defects was on the medial patella (46 patients-72%) and the mean patellar defect size was 2.8 cm2. Among 93 patients who completed patient-reported outcome scores, the 52 with grade III or IV chondral damage reported a significantly poorer KOOS Quality of Life than the 44 patients with grade 0 to II chondral damage (p = 0.041), controlling for patient age, sex, BMI, and anatomical factors.

Conclusion

Patients with grade III or IV articular cartilage damage of the patellofemoral joint at the time of MPFL reconstruction demonstrated poorer KOOS knee-related quality of life than patients without grade III or IV articular cartilage damage at a mean of 4.8 years following isolated MPFL reconstruction.

Level of evidence

Level II
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Metadata
Title
Patellofemoral articular cartilage damage is associated with poorer patient-reported outcomes following isolated medial patellofemoral ligament reconstruction
Authors
Roberto C. Gonzalez
David J. Ryskamp
Steven D. Swinehart
Parker A. Cavendish
Eric Milliron
Alex C. DiBartola
Robert A. Duerr
David C. Flanigan
Robert A. Magnussen
Publication date
16-11-2022
Publisher
Springer Berlin Heidelberg
Published in
Knee Surgery, Sports Traumatology, Arthroscopy / Issue 7/2023
Print ISSN: 0942-2056
Electronic ISSN: 1433-7347
DOI
https://doi.org/10.1007/s00167-022-07221-x

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