Three-dimensional nonlinear finite element model of lumbar intervertebral disc

• Autorzy: Lodygowski T. , Kąkol W. , Wierszycki M. , Ogurkowska M.
• Języki publikacji: EN

Abstrakty

EN

The main objective of this study is to model a three-dimensional nonlinear finite-element vertebra disc, which can be used in further simulation of human lumbar spinal segments in surgery, analyses of spinal equilibrium and stability. Because of complexity of modelling it is proposed to cary* out analyses on the simplified model built in such a way that the nonlinear response of the disc is replaced by a spring-type behaviour whose characteristics are obtained by computer simulations of an isolated disc. The geometry data of a human lumbar spinal segment, including a disc, is acquired from the computer tomography or magnetic nuclear resonance measurements, and a CAD model is designed and imported into FEA program. The simplified model was validated for loading schemes, including axial compression, bending and torsion acting on the spinal L4-L5 segment. Two models of intervertebra disc are shown and theirs advantages and accuracy are discussed.

Słowa kluczowe

EN

biomechanics; nonlinear FEA; lumbar spine

PL

biomechanika; kręgosłup

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Acta of Bioengineering and Biomechanics
• Rocznik: 2005
• Tom: Vol. 7, nr 2
• Strony: 29--37
• Opis fizyczny: Bibliogr. 23 poz., il., rys., tab.

Twórcy

autor

Lodygowski T.

• Institute of Structural Engineering, Poznań University of Technology, Piotrowo 5, 60-965 Poznań

autor

Kąkol W.

• Institute of Structural Engineering, Poznań University of Technology, Piotrowo 5, 60-965 Poznań

autor

Wierszycki M.

• Institute of Structural Engineering, Poznań University of Technology, Piotrowo 5, 60-965 Poznań

autor

Ogurkowska M.

• Department of Biomechanics, University School of Physical Education, Królowej Jadwigi 27/35, 61-871 Poznań

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