Knee Surgery, Sports Traumatology, Arthroscopy

, Volume 18, Issue 11, pp 1470–1475 | Cite as

An analysis of the medial patellofemoral ligament length change pattern using open-MRI

  • Tetsuo Higuchi
  • Yuji Arai
  • Hisatake Takamiya
  • Tatsuya Miyamoto
  • Daisaku Tokunaga
  • Toshikazu Kubo
Knee

Abstract

Recently, for a recurrent patellar dislocation, medial patellofemoral ligament (MPFL) reconstruction has come to be commonly performed, yet the precise in vivo MPFL biomechanics still remains to be clarified. The purpose of this study was to analyze the length change pattern of MPFL in vivo. The subjects were comprised of ten male and ten female healthy volunteers. The length of the MPFL was measured using an open-MRI both from a leg extended position and a highly knee-flexed position in order to analyze the length change pattern of the MPFL. The MPFL length for men and women resulted in an average of 52 ± 3 mm and 43 ± 2 mm at the knee extended position, respectively. The length change pattern of the MPFL presented a slight change at up to a flexion angle of 60° and a decrease at over 60°. In terms of morphology, the fiber bundle of the MPFL experienced linear tension at a knee flexion angle of 60°. We determined that the MPFL length in vivo exhibited a specific length change pattern. MPFL mainly contributes to the medial constraint of a patella with a knee flexion of 0° to 60°, wherein it is expected to have the strongest strain at 60°. However, more studies are needed to obtain a better understanding of cases with a history of patellar dislocation.

Keywords

Medial patellofemoral ligament MRI Patella Dislocation Biomechanics 

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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Tetsuo Higuchi
    • 1
  • Yuji Arai
    • 1
  • Hisatake Takamiya
    • 1
  • Tatsuya Miyamoto
    • 2
  • Daisaku Tokunaga
    • 3
  • Toshikazu Kubo
    • 1
  1. 1.Department of Orthopaedics, the Graduate School of Medical ScienceKyoto Prefectural University of MedicineKamigyo-kuJapan
  2. 2.Rokujizo General HospitalUji-cityJapan
  3. 3.Department of Biomaterials and BiomechanicsKyoto Prefectural University of MedicineKamigyo-kuJapan

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