Biomechanical analysis of endobutton versus screw fixation after Lisfranc ligament complex sectioning

Daniel Marsland, Stephen M. Belkoff, Matthew C. Solan

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Our goal was to compare diastasis after endobutton and screw fixation after Lisfranc ligament complex sectioning. Methods: Twenty-four (12 pairs) fresh-frozen cadaveric feet were assigned to endobutton or screw fixation and loaded to 343. N. Displacement (first-second metatarsal bases) was measured in intact feet and after ligament sectioning (Lisfranc, medial-intermediate cuneiform ligaments), fixation, and 10,000 cycles. Results: The mean change in diastasis for endobutton and screw fixation under initial loading was 1.0. mm (95% CI, 0.2-1.9. mm) and 0.0. mm (95% CI, -0.4 to 0.4. mm), respectively ( p= 0.017). After cyclic loading, diastasis decreased (mean, -0.7. mm, 95% CI, -1.2 to -0.1. mm) in the endobutton group but was unchanged in the screw group ( p= 0.035). Conclusions: Diastasis after endobutton fixation was significantly greater than after screw fixation under initial loading but did not increase further after cyclic loading.

Original languageEnglish (US)
Pages (from-to)267-272
Number of pages6
JournalFoot and Ankle Surgery
Volume19
Issue number4
DOIs
StatePublished - Dec 1 2013

Keywords

  • Biomechanical
  • Endobutton
  • Lisfranc ligament rupture
  • Screw

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

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