A finite element model of the L4-L5-S1 human spine segment including the heterogeneity and anisotropy of the discs

• Autorzy: Jaramillo H. , Gomez L. , Garcia J. J.

Identyfikatory

DOI

10.5277/ ABB-00046-2014-02

• Języki publikacji: EN

Abstrakty

EN

With the aim to study disc degeneration and the risk of injury during occupational activities, a new finite element (FE) model of the L4-L5-S1 segment of the human spine was developed based on the anthropometry of a typical Colombian worker. Beginning with medical images, the programs CATIA and SOLIDWORKS were used to generate and assemble the vertebrae and create the soft structures of the segment. The software ABAQUS was used to run the analyses, which included a detailed model calibration using the experimental step-wise reduction data for the L4-L5 component, while the L5-S1 segment was calibrated in the intact condition. The range of motion curves, the intradiscal pressure and the lateral bulging under pure moments were considered for the calibration. As opposed to other FE models that include the L5-S1 disc, the model developed in this study considered the regional variations and anisotropy of the annulus as well as a realistic description of the nucleus geometry, which allowed an improved representation of experimental data during the validation process. Hence, the model can be used to analyze the stress and strain distributions in the L4-L5 and L5-S1 discs of workers performing activities such as lifting and carrying tasks.

Słowa kluczowe

EN

intervertebral disc; L4-L5-S1 segment; finite element model; human spine; hyperelastic model

PL

kręgosłup; metoda elementów skończonych; segment L4-L5-S1; krążek międzykręgowy; model hipersprężysty

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Acta of Bioengineering and Biomechanics
• Rocznik: 2015
• Tom: Vol. 17, no. 2
• Strony: 15--24
• Opis fizyczny: Bibliogr. 29 poz., rys., tab., wykr.

Twórcy

autor

Jaramillo H.

• Universidad del Valle, Cali-Colombia
• Universidad Autonoma de Occidente, Cali-Colombia

autor

Gomez L.

• Universidad del Valle, Cali-Colombia
• Universidad Libre, Cali-Colombia

autor

Garcia J. J.

• Universidad del Valle, Cali-Colombia

Bibliografia

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