Biomechanical comparative evaluation of percutaneous fixations with vertebral expansion for vertebral compression fractures: an experimental and finite element study

Le Gallo Lucas, V. P. C. Lima Lucas, Persohn Sylvain, Nérot Agathe, Rousseau Marc-Antoine, Simon Laurie and Skalli Wafa

Computer Methods in Biomechanics and Biomedical Engineering, 2022, vol. 25, issue 5, 487-498

Abstract: This study uses in vitro experiments and validated finite element models (FEM) to analyze the effect of posterior fixation, alone or associated with expandable device (ED) and/or cement. 3-dimensional FEMs of intact, fractured and instrumented spine were built and compared with experimental load-displacement curves. FEM ranges of motion were within the experimental corridors. Stresses appeared sensitive to both implant configuration and fracture severity with a stress reduction up to 84%. The FEM highlighted that for a same instrumental strategy, different biomechanical performances were observed according to fracture severity. When bone continuity is altered, both ED and cement may be needed.

Date: 2022
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DOI: 10.1080/10255842.2021.1959919

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