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Patients who undergo bilateral medial patellofemoral ligament reconstruction return to sport at a similar rate as those that undergo unilateral reconstruction

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Knee Surgery, Sports Traumatology, Arthroscopy Aims and scope

Abstract

Purpose

Lateral patellar instability is a debilitating condition not only to athletes, but also to a wide range of highly active individuals. Many of these patients experience symptoms bilaterally, though it is unknown how these patients fair with return to sports following a second medial patellofemoral ligament reconstruction (MPFLR). The purpose of this study is to evaluate the rate of return to sport following bilateral MPFLR compared to a unilateral comparison group.

Methods

Patients who underwent primary MPFLR with minimum 2-year follow-up were identified from 2014 to 2020 at an academic center. Those who underwent primary MPFLR of bilateral knees were identified. Pre-injury sport participation and Tegner score, Kujala score, Visual Analog Score (VAS) for pain, satisfaction, and MPFL-Return to Sport after Injury (MPFL-RSI) scale were collected. Bilateral and unilateral MPFLRs were matched in a 1:2 ratio based on age, sex, body mass index, and concomitant tibial tubercle osteotomy (TTO). A sub-analysis was performed regarding concomitant TTO.

Results

The final cohort consisted of 63 patients, including 21 patients who underwent bilateral MPFLR, matched to 42 unilateral patients at mean follow-up of 47 ± 27 months. Patients who underwent bilateral MPFLR returned to sport at a rate of 62% at a mean of 6.0 ± 2.3 months, compared to a unilateral rate of 72% at 8.1 ± 4.2 months (n.s.). The rate of return to pre-injury level was 43% among bilateral patients and 38% in the unilateral cohort. There were no significant differences in VAS pain, Kujala, current Tegner, satisfaction, and MPFL-RSI scores between cohorts. Approximately half of those (47%) who failed to return to sport cited psychological factors and had significantly lower MPFL-RSI scores (36.6 vs 74.2, p = 0.001).

Conclusion

Patients who underwent bilateral MPFLR returned to sports at a similar rate and level compared to a unilateral comparison group. MPFL-RSI was found to be significantly associated with return to sport.

Level of evidence

III.

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Data availability

The datasets used and/or analysed during the current study are available from the corresponding author on reasonable request.

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Funding

No grant funding was received for this investigation.

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Authors and Affiliations

  1. Department of Orthopedic Surgery, New York University Langone Health, 333 East 38th St, New York, NY, 10016, USA

    Zachary I. Li, Jairo Triana, Ariana Lott, Naina Rao, Taylor Jazrawi, Samuel R. Montgomery Jr., Michael Buldo-Licciardi, Michael J. Alaia, Eric J. Strauss, Laith M. Jazrawi & Kirk A. Campbell

Authors
  1. Zachary I. Li
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  2. Jairo Triana
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  3. Ariana Lott
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  4. Naina Rao
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  7. Michael Buldo-Licciardi
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  11. Kirk A. Campbell
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Contributions

ZIL drafted the original manuscript and assisted with data curation. JT contributed to the writing of the original manuscript and assisted with data collection. AL contributed to formal analysis and conceptualization of the study idea. NR performed the formal analysis and reviewed and edited the manuscript. TJ curated project data and reviewed and edited the manuscript. SRM contributed to writing of the original manuscript. MBL curated project data and reviewed and edited the manuscript. MJA conceptualized the study idea and reviewed and edited the manuscript. EJS designed the methodology and reviewed and edited the manuscript. LMJ revised the manuscript. KAC conceptualized and supervised the study and reviewed and edited the manuscript.

Corresponding author

Correspondence to Zachary I. Li.

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IRB protocol #19–01430 (New York University School of Medicine).

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Li, Z.I., Triana, J., Lott, A. et al. Patients who undergo bilateral medial patellofemoral ligament reconstruction return to sport at a similar rate as those that undergo unilateral reconstruction. Knee Surg Sports Traumatol Arthrosc 31, 4195–4203 (2023). https://doi.org/10.1007/s00167-023-07462-4

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