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Knee Surgery, Sports Traumatology, Arthroscopy

, Volume 27, Issue 8, pp 2599–2607 | Cite as

Reconstruction of the medial patellofemoral ligament and reinforcement of the medial patellotibial ligament is an effective treatment for patellofemoral instability with patella alta

  • Yimeng Yang
  • Qiang ZhangEmail author
KNEE

Abstract

Purpose

To evaluate the clinical outcome of the combined reconstruction of the medial patellofemoral ligament (MPFL) and medial patellotibial ligament (MPTL) for patellar instability with patella alta.

Methods

A total of 108 patients underwent a combined reconstruction of the MPFL and MPTL, and 58 patients were included in this study. The clinical results were evaluated and compared using the International Knee Documentation Committee (IKDC) scores, Kujala scores, and visual analogue scale (VAS) scores. The tibial tuberosity–trochlear groove (TT–TG) distance, three indices of patellar height (Insall–Salvati ratio, modified Insall–Salvati ratio, and Caton–Deschamps index), and patellar shift and tilt were defined preoperatively and at the 12- and 24-month follow-up visits.

Results

At the 12- and 24-month follow-up visits, 86.2% (50/58) and 87.9% (51/58) of the subjective outcomes were excellent, 5/58 (8.6%) and 4/58 (6.9%) were good, 1/58 (1.7%) and 2/58 (3.4%) were fair, and 2/58 (3.4%) and 1/58 (1.7%) were poor. There were significant improvements in the IKDC scores, from 51.9 ± 13.8 preoperatively to 80 ± 19.2 (P < 0.05) at 12 months and 85 ± 13.9 (P < 0.05) at 24 months; Kujala scores, from 55.1 ± 15.2 preoperatively to 82.6 ± 14.9 (P < 0.05) at 12 months and 89.5 ± 10.2 (P < 0.05) at 24 months; and VAS scores, from 58 ± 11 preoperatively to 12 ± 5 (P < 0.05) at 12 months and 11 ± 4 (P < 0.05) at 24 months. The patellar tilt, patellar shift, Insall–Salvati ratio, modified Insall–Salvati ratio, Caton–Deschamps index, and TT–TG distance all decreased significantly compared with the preoperative values, and there were no significant differences between the values at the 12- and 24-month follow-ups.

Conclusion

The results of this study show that a combined reconstruction of the MPFL and MPTL is an effective treatment for patellar instability with patella alta. This article emphasizes the combined effect of MPFL and MPTL instead of MPFL alone and provides an effective option for the treatment of recurrent patellar dislocation with patella alta.

Level of evidence

Case series, Level IV.

Keywords

Patella instability Medial patellofemoral ligament Medial patellotibial ligament Patella alta 

Notes

Funding

The study was supported by Beijing Nova Program (Z161100004916137).

Compliance with ethical standards

Conflict of interest

The authors report that they have no conflicts of interest in the authorship and publication of this article.

Ethical approval

This study was ethically approved by the Chinese People's Liberation Army General Hospital institutional review board.

Supplementary material

Supplementary material 1 (MP4 199913 KB)

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Copyright information

© European Society of Sports Traumatology, Knee Surgery, Arthroscopy (ESSKA) 2018

Authors and Affiliations

  1. 1.Department of OrthopedicsThe General Hospital of Chinese People’s Liberation ArmyBeijingChina
  2. 2.Department of Orthopaedic SurgeryRoyal Liverpool University HospitalLiverpoolUK

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