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Medial patellofemoral ligament reconstruction with allograft versus autograft tissue results in similar recurrent dislocation risk and patient-reported outcomes

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Knee Surgery, Sports Traumatology, Arthroscopy Aims and scope

Abstract

Purpose

To determine the rate of recurrent dislocation and patellar instability following medial patellofemoral ligament (MPFL) reconstruction with allograft or autograft tissue and compare patient-reported outcomes for patients undergoing allograft and autograft MPFL reconstruction.

Methods

One hundred and fifteen MPFL reconstructions (78 allograft, 37 autograft) without concurrent bony procedures performed between 2008 and 2014 by four sports medicine fellowship-trained orthopedic surgeons at our center were identified. Patient demographics and surgical data were identified by chart review. Chart review and patient interviews were undertaken to identify recurrent patellar dislocations and as recurrent subjective patellofemoral instability. Recurrent dislocation and subjective instability risk were compared between the allograft and autograft groups.

Results

Eighty-seven patients (76%) with complete baseline data and minimum 1-year follow-up were contacted at a mean of 4.1 years following isolated MPFL reconstruction, including 57 patient with allograft reconstructions and 30 with autograft reconstructions. No significant differences in patient sex, age at reconstruction, body mass index, or time to follow-up were noted between groups. Recurrent dislocation occurred in 2 patients in the allograft group (3.5%) and 1 patient in the autograft group (3.3%), (n.s.). Recurrent subjective instability occurred in 17 patients in the allograft group (28.9%) and 11 patients in the autograft group (36.7%), (n.s.). No significant differences in patient-reported outcomes were noted between groups.

Conclusion

The use of either allograft or autograft tissue for MPFL reconstruction results in low (< 3%) risk of recurrent patellar dislocation. Risk of recurrent subjective instability is higher but is similar for both graft types. Surgeons can utilize either graft choice at their discretion without anticipating a significant impact of graft choice on patient outcomes.

Level of evidence

III.

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The authors received no funding for this study.

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Authors and Affiliations

  1. Department of Orthopaedics, The Ohio State University College of Medicine, Columbus, OH, USA

    David C. Flanigan, Scott Shemory & Robert A. Magnussen

  2. Sports Medicine Research Institute, The Ohio State University Wexner Medical Center, 2835 Fred Taylor Dr, Columbus, OH, 43202, USA

    David C. Flanigan, Scott Shemory, Nathaniel Lundy, Michael Stitgen, Joseph M. Long & Robert A. Magnussen

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  1. David C. Flanigan
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  2. Scott Shemory
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Correspondence to Robert A. Magnussen.

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Conflict of interest

David C. Flanigan is a consultant for Depuy Mitek, Inc., Smith & Nephew, vericel, Ceterix Orthopaedics, Conmed, Histogenics Corporation, Zimmer Inc.

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This study was approved by the Biomedical Institutional Review Board of The Ohio State University.

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Flanigan, D.C., Shemory, S., Lundy, N. et al. Medial patellofemoral ligament reconstruction with allograft versus autograft tissue results in similar recurrent dislocation risk and patient-reported outcomes. Knee Surg Sports Traumatol Arthrosc 28, 2099–2104 (2020). https://doi.org/10.1007/s00167-020-05920-x

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