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Modélisation biomécanique de la hanche dans le risque de fracture du fémur proximal

Abstract : Hip fractures are largely considered as a major health-care problem. 90% of hip fracture result of a fall of the subject on the hip. To analyse the implication of muscles, a biomechanical hip model including soft tissue is proposed in this study. An original method for muscular volume reconstruction from a reduced number of CT-scan slices and a quantification of muscular tissue quality was developed. Method was based on deformation of a parameterized patient specific object of each muscle. Using only 4 slices for each muscle, error of volume measurement is lower than 6% comparing to volume obtained manually. Analysis of 98 subjects allowed to assess reference values and to bring to the light invariants. Finite element model includes bones structures and soft tissue, with surface contact elements between components. Hyperelastic constitutive equations, with hypothesis of incompressibility and isotropy were used to model soft tissue mechanical behaviour. Preliminary simulations with quasi-static lateral compression were performed to verify the coherence of the model's response for ten subjects and to bring out the importance of a patient specific modelling approach.
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Submitted on : Monday, December 17, 2007 - 8:00:00 AM
Last modification on : Wednesday, October 27, 2021 - 2:51:53 PM
Long-term archiving on: : Wednesday, September 8, 2010 - 5:52:46 PM


  • HAL Id : pastel-00003206, version 1


Erwan Jolivet. Modélisation biomécanique de la hanche dans le risque de fracture du fémur proximal. Sciences de l'ingénieur [physics]. Arts et Métiers ParisTech, 2007. Français. ⟨NNT : 2007ENAM0019⟩. ⟨pastel-00003206⟩



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