Biomechanical evaluation with a novel cadaveric model using supination and pronation testing of a lisfranc ligament injury
Carregando...
Data
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Minas Gerais
Descrição
Tipo
Artigo de periódico
Título alternativo
Primeiro orientador
Membros da banca
Resumo
Background: Lisfranc joint injuries can be due to direct or indirect trauma and while the precise mechanisms are unknown,twisting or axial force through the foot is a suspected contributor. Cadaveric models are a useful way to evaluate injury patterns and models of fixation, but a frequent limitation is the amount of joint displacement after injury. The purpose of this study was to test a cadaveric model that includes axial load, foot plantarflexion and pronation-supination motion, which could re-create bone diastasis similar to what is seen in subtle Lisfranc injuries. Our hypothesis was that applying pronation and supination motion to a cadaveric model would produce reliable and measurable bone displacements.Methods: Twenty-four fresh-frozen lower leg cadaveric specimens were used. The medial (C1) and intermediate (C2)cuneiforms and the first (M1) and second (M2) metatarsal bones were marked. A complete ligament injury was performed between C1-C2 and C1-M2 in 12 specimens (group 1), and between C1-C2, C1-M2, C1-M1, and C2-M2 in 12 matched
specimens (group 2). Foot pronation and supination in addition to an axial load of 400 N was applied to the specimens. A 3D
digitizer was used to measure bone distances.Results: After ligament injury, distances changed as follows: C1-C2 increased 3 mm (23%) with supination; C1-M2 increased 4 mm (21%) with pronation (no differences between groups). As expected, distances between C1-M1 and C2-M2 only changed in group 2, increasing 3 mm (14%) and 2 mm (16%), respectively (no differences between pronation and supination).M1-M2 and C2-M1 distances did not reach significant difference for any condition.Conclusions: Pronation or supination in addition to axial load produced measurable bone displacements in a cadaveric modelof Lisfranc injury using sectioned ligaments. Distances M1-M2 and C2-M1 were not reliable to detect injury in this model.Clinical Relevance: This new cadaveric Lisfranc model included foot pronation-supination in addition to axial load delivering measurable bone diastasis. It was a reliable Lisfranc cadaveric model that could be used to test different Lisfranc reconstructions.
Abstract
Assunto
Cadaver, Ankle Injuries
Palavras-chave
Lisfranc fracture, Cadaveric model, Biomechanical model, Lisfranc model, Lisfranc repair
Citação
Departamento
Curso
Endereço externo
https://journals.sagepub.com/doi/10.1177/2473011419898265