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Analyse biomécanique des mécanismes d'aggravation de la scoliose idiopathique de l'adolescent à l'aide de la modélisation géométrique et mécanique personnalisée

Abstract : Adolescent idiopathic scoliosis is a three dimensional deformity of the spine. Young girls are mainly affected during their growth. Early detection of sudden progression of the deformities is essential for a better management. Progression mechanisms analysis will help in prognosis tool development. The aim of the study is to analyse scoliosis progression mechanisms using geometrical and mechanical patient-specific modelling. First, combine effect of abnormal growth and intervertebral disc's hyperlaxity was investigated using a patient-specific finite element model. Then, a specific geometrical pattern of progressive scoliosis was used to assess the progression risk at first exam of the follow-up. The proposed method was validated on 49 subjects. Differences in scoliosis mechanical behaviour were investigated to characterize progressive scoliosis using numerical simulation of progression. It seems that a specific initial geometrical defect and an abnormal growth are necessary to scoliosis progression. Discs' hyperlaxity seems to be a progression catalyst. Progression simulation results were used to evaluate preliminary an early and local correction of the deformities.
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https://pastel.archives-ouvertes.fr/pastel-00589362
Contributor : Xavier Drevelle <>
Submitted on : Thursday, April 28, 2011 - 5:12:33 PM
Last modification on : Saturday, February 15, 2020 - 1:53:04 AM
Long-term archiving on: : Friday, July 29, 2011 - 2:44:05 AM

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  • HAL Id : pastel-00589362, version 1

Citation

Xavier Drevelle. Analyse biomécanique des mécanismes d'aggravation de la scoliose idiopathique de l'adolescent à l'aide de la modélisation géométrique et mécanique personnalisée. Biomécanique [physics.med-ph]. Arts et Métiers ParisTech, 2011. Français. ⟨NNT : 2011ENAM0007⟩. ⟨pastel-00589362⟩

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