Elastic constants influence on the L4-L5-S1 annuli fibrosus behavior, a probabilistic finite element analysis

dc.creatorJaramillo Suárez, Héctor Enrique
dc.creatorGarcía Álvarez, José Jaime
dc.date.accessioned2019-10-16T13:32:04Z
dc.date.accessioned2022-09-22T18:43:05Z
dc.date.available2019-10-16T13:32:04Z
dc.date.available2022-09-22T18:43:05Z
dc.date.created2019-10-16T13:32:04Z
dc.date.issued2017
dc.identifierJaramillo, H. E., & Garcia, J. J. (2017). Elastic constants influence on the L4-L5-S1 annuli fibrosus behavior, a probabilistic finite element analysis. Acta of bioengineering and biomechanics, 19(4)
dc.identifier1509409X
dc.identifierhttp://hdl.handle.net/10614/11216
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/3457184
dc.description.abstractA probabilistic finite element (FE) analysis of the L4-L5 and L5-S1 human annulus fibrosus (AF) was conducted to obtain a better understanding of the biomechanics of the AF and to quantify its influence on the range of motion (ROM) of the L4-L5 and L5-S1 segments. Methods: The FE models were composed of the AF and the upper and lower endplates. The AF was represented as a continuous material composed of a hyperelastic isotropic Yeoh matrix reinforced with two families of fibers described with an exponential energy function. The caudal endplate was fully restricted and 8 Nm pure moment was applied to the cranial endplate in flexion, extension, lateral flexion and axial rotation. The mechanical constants were determined randomly based on a normal distribution and average values reported. Results: Results of the 576 models show that the ROM was more sensitive to the initial stiffness of the fibers rather than to the stiffening coefficient represented in the exponential function. The ROM was more sensitive to the input variables in extension, flexion, axial rotation and lateral bending. The analysis showed an increased probability for the L5-S1 ROM to be higher in flexion, extension and axial rotation, and smaller in lateral flexion, with respect to the L4-L5 ROM. Conclusions: An equation was proposed to obtain the ROM as a function of the elastic constants of the fibers and it may be used to facilitate the calibration process of the human spine segments and to understand the influence of each elastic constant on the ROM
dc.languageeng
dc.publisherWroclaw University of Science and Technology.
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dc.relationActa of Bioengineering and Biomechanics
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dc.rightshttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightsAtribución-NoComercial-SinDerivadas 4.0 Internacional (CC BY-NC-ND 4.0)
dc.rightsDerechos Reservados - Universidad Autónoma de Occidente
dc.titleElastic constants influence on the L4-L5-S1 annuli fibrosus behavior, a probabilistic finite element analysis
dc.typeArtículo de revista


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