Knee Surgery, Sports Traumatology, Arthroscopy

, Volume 25, Issue 10, pp 3206–3212 | Cite as

An evaluation of the effectiveness of medial patellofemoral ligament reconstruction using an anatomical tunnel site

  • Kars P. Valkering
  • Aysha Rajeev
  • Nick Caplan
  • Wim E. Tuinebreijer
  • Deiary F. Kader
Knee

Abstract

Purpose

Medial patellofemoral ligament (MPFL) reconstruction for recurrent patellar instability has gained popularity, and anatomical and biomechanical studies have recently altered our operative techniques. The aim of this study was to report the clinical outcome of this new anatomical MPFL reconstructive technique and investigate whether correlating factors could be identified.

Methods

Between 2009 and 2012, a total of 31 consecutive patients underwent MPFL reconstruction using an autologous gracilis graft and anatomical tunnel placement. Pre- and post-operative data were collected as a part of routine clinical practice. The preoperative assessment included a rotational profile CT scan of the lower extremity according to the Lyon protocol with TT–TG distance measurement. Outcomes were evaluated with the Kujala and Norwich patella instability (NPI) scores preoperatively and at follow-up (1.5–5.1 years).

Results

A significant improvement in both the Kujala (p < 0.001) and NPI (p = 0.012) scores was recorded. A medium and large negative correlations were found between TT–TG distance and Kujala score improvement (ρ = −0.48, p = 0.020) and NPI score improvement (ρ = −0.83, p = 0.042), respectively. Multiple regression analysis identified TT–TG distance, Beighton score and BMI as factors explaining the variance of Kujala score improvement.

Conclusion

Anatomical MPFL reconstruction with the gracilis autograft for patellar instability resulted in good outcome. This underlines the importance of anatomical tunnel placement in MPFL reconstruction. With a precise preoperative work-up, factors can be identified that may guide selecting the optimal operative strategy and improve counselling of the patient.

Level of evidence

Case series, Level IV.

Keywords

Knee Patella Instability Medial patellofemoral ligament Kujala score Norwich Patella instability score TT–TG Beighton score 

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Copyright information

© European Society of Sports Traumatology, Knee Surgery, Arthroscopy (ESSKA) 2016

Authors and Affiliations

  • Kars P. Valkering
    • 1
  • Aysha Rajeev
    • 1
  • Nick Caplan
    • 2
  • Wim E. Tuinebreijer
    • 3
  • Deiary F. Kader
    • 1
    • 2
    • 4
  1. 1.Department of Trauma and OrthopaedicsQueen Elizabeth HospitalGatesheadUK
  2. 2.Faculty of Health and Life SciencesNorthumbria UniversityNewcastle upon TyneUK
  3. 3.Department of General SurgeryRed Cross HospitalBeverwijkThe Netherlands
  4. 4.Nuffield HospitalNewcastle upon TyneUK

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