Biomechanical evaluation of medial patello-femoral ligament reconstruction: comparison between a double-bundle converging tunnels technique versus a single-bundle technique.

Giacomo Placella, Andrea Speziali, Matteo Maria Tei, Giuliano Giorgio Cerulli, E. Sebastiani, S. Morello

Risultato della ricerca: Contributo in rivistaArticolo in rivistapeer review

15 Citazioni (Scopus)

Abstract

BACKGROUND: Several MPFL reconstructions are commonly performed for recurrent patellar dislocation, but misleading data are currently available in the literature on the ability of the different techniques to re-create a functioning ligament. MATERIALS AND METHODS: In this study, we showed the biomechanical properties of two different procedures for MPFL reconstruction using a natural orientation during uniaxial tensile testing. Eighteen fresh-frozen human knees were randomly assigned to two groups of nine each. In the group A, the reconstruction was performed using a double converging tunnels technique and in the group B was used a single-tunnel technique with semitendinosus autograft. The specimens were loaded in natural orientation using an Instron tensile test machine, and the stiffness and ultimate load were determined. RESULTS: The ultimate load was 213 ± 90 and 171 ± 51 N using our double-bundle technique (group A) and the single-bundle technique (group B), respectively. One (11 %) specimen failed at the patellar side due to patellar fracture in the group B. There was no statistical significant difference (p > 0.05) between the two groups in terms of stiffness and ultimate load. CONCLUSION: This study is the first biomechanical evaluation of the MPFL reconstructions in natural orientation. Both the procedures achieved safe fixation of the graft at the femoral attachment; however, the single-bundle technique reported 11 % of failure at the patellar side due to patellar fracture. In addition, the double-bundle technique can better restore the anatomy of the native ligament.
Lingua originaleEnglish
pagine (da-a)N/A-N/A
RivistaMusculoskeletal Surgery
Volume2016
DOI
Stato di pubblicazionePubblicato - 2016

Keywords

  • Biomechanics
  • MPFL reconstruction
  • Specimen orientation

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