An experimental-numerical method for the calibration of finite element models of the lumbar spine.

Autor: Nicolini LF; Institute of General Mechanics (IAM), RWTH Aachen University, Eilfschornsteinstr. 18, Aachen, 52062, North Rhine-Westphalia, Germany; Department for Trauma and Reconstructive Surgery, RWTH Aachen University Hospital, Pauwelsstraße 30, Aachen, 52074, North Rhine-Westphalia, Germany; Mechanical and Analysis Design Group (GRANTE), Federal University of Santa Catarina, R. Lauro Linhares, 1850, Florianópolis, 88070-260, Santa Catarina, Brazil. Electronic address: lfernandonicolini@gmail.com., Beckmann A; Institute of General Mechanics (IAM), RWTH Aachen University, Eilfschornsteinstr. 18, Aachen, 52062, North Rhine-Westphalia, Germany., Laubach M; Department for Trauma and Reconstructive Surgery, RWTH Aachen University Hospital, Pauwelsstraße 30, Aachen, 52074, North Rhine-Westphalia, Germany., Hildebrand F; Department for Trauma and Reconstructive Surgery, RWTH Aachen University Hospital, Pauwelsstraße 30, Aachen, 52074, North Rhine-Westphalia, Germany., Kobbe P; Department for Trauma and Reconstructive Surgery, RWTH Aachen University Hospital, Pauwelsstraße 30, Aachen, 52074, North Rhine-Westphalia, Germany., Mello Roesler CR; Mechanical and Analysis Design Group (GRANTE), Federal University of Santa Catarina, R. Lauro Linhares, 1850, Florianópolis, 88070-260, Santa Catarina, Brazil., Fancello EA; Mechanical and Analysis Design Group (GRANTE), Federal University of Santa Catarina, R. Lauro Linhares, 1850, Florianópolis, 88070-260, Santa Catarina, Brazil., Markert B; Institute of General Mechanics (IAM), RWTH Aachen University, Eilfschornsteinstr. 18, Aachen, 52062, North Rhine-Westphalia, Germany., Stoffel M; Institute of General Mechanics (IAM), RWTH Aachen University, Eilfschornsteinstr. 18, Aachen, 52062, North Rhine-Westphalia, Germany.
Jazyk: angličtina
Zdroj: Medical engineering & physics [Med Eng Phys] 2022 Sep; Vol. 107, pp. 103854. Date of Electronic Publication: 2022 Jul 19.
DOI: 10.1016/j.medengphy.2022.103854
Abstrakt: We present a systematic and automated stepwise method to calibrate computational models of the spine. For that purpose, a sequential resection study on one lumbar specimen (L2-L5) was performed to obtain the individual contribution of the IVD, the facet joints and the ligaments to the kinematics of the spine. The experimental data was prepared for the calibration procedure in such manner that the FE model could reproduce the average motion of the 10 native spines from former cadaveric studies as well as replicate the proportional change in ROM after removal of a spinal structure obtained in this resection study. A Genetic Algorithm was developed to calibrate the properties of the intervertebral discs and facet joints. The calibration of each ligament was performed by a simple and novel technique that requires only one simulation to obtain its mechanical property. After calibration, the model was capable of reproducing the experimental results in all loading directions and resections.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022 IPEM. Published by Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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