Development and Validation of a 10-Year-Old Child Ligamentous Cervical Spine Finite Element Model

Dong, Liqiang; Li, Guangyao; Mao, Haojie; Marek, Stanley L.; Yang, King H.

doi:10.1007/s10439-013-0858-7

Cited by 57 publications

(25 citation statements)

References 55 publications

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“…Compared to these two experimental values, the deviations in ultimate failure displacement were 8.6% and 25.5%, whereas deviations in ultimate failure force were 17.5% and 26.1%. We observed that failure occurred in the upper surface of the C3 endplate and the growth plate, similar to the locations predicted by Dong based on dynamic tensile simulations from a 10-year-old [15].…”

Section: Resultssupporting

confidence: 85%

“…The pediatric cervical spine is significantly different from the adult spine with regard to its anatomical and material properties [2,10,15,31]. In this study, the C2-C7 cervical segmental response was first validated under the dynamic tensile response and the dynamic extension-flexion response were then compared with both segmental and global experimental data.…”

Section: Discussionmentioning

confidence: 99%

“…The 3-D geometry data for the osseous structures were reconstructed in 3-D using MIMICS (Version 12, Materialise Inc., Leuven, Belgium), as shown in Figure 1b. The geometries of the ligaments, cartilage, and intervertebral discs not visible in the CT images were filled in between the bony segments based on pediatric cervical anatomy [3,[12][13][14] and pediatric spinal models [7][8][9]15]. In our study, we adopted a multi-block approach to generate vertebral body meshes efficiently (ANSYS ICEM CFD/HEXA 12.0, Ansys, Canonsburg, PA, USA).…”

Section: Methdo and Materialsmentioning

confidence: 99%

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Development and Tensile Investigation of a 3-year-old Cervical Spine Finite Element Model

Wei¹,

Zhang²,

Du³

et al. 2017

dtetr

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Abstract.A 3-year-old cervical spine finite element (FE) model with detailed anatomical and material properties was developed and validated against cadaver tests under dynamic loadings. First, the bone geometry was reconstructed based on high-resolution computed tomography (CT) scans, and the elastic-plastic material was defined to simulate the cortical and cancellous bones. Second, to simulate various ligament tears during dynamic tensile, ligaments failure were defined using force versus displacement curves, which had a sigmoidal shape governed by three control point. To better represent complicated structure of disc, such as nucleus pulposus, annulus fibrosus substrate and four pairs of reinforced fiber lamina, the intervertebral discs were defined using composite materials which combined by viscoelastic material, hill foam material and four pairs of reinforced fiber lamina, respectively. Finally, dynamic tensile experiments in C4-C5 and C0-C7 were used to validate the dynamic ultimate force and displacement of the 3-year-old cervical FE model, revealing that this FE model is capable of predicting intervertebral disc injury and ligament tear. This FE model will contribute to a better understanding of the mechanisms underlying pediatric cervical injuries.

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Section: Resultssupporting

confidence: 85%

Section: Discussionmentioning

confidence: 99%

Section: Methdo and Materialsmentioning

confidence: 99%

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Development and Tensile Investigation of a 3-year-old Cervical Spine Finite Element Model

Wei¹,

Zhang²,

Du³

et al. 2017

dtetr

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“…The10-year-old pediatric ligamentous cervical spine model of head up to the T1 level was developed in a previous study (Dong et al 2013). The neck model, including muscles as shown in Figure 1, was created using the explicit FE solver LS-Dyna 971 (LSTC, Livermore, CA).…”

Section: Methodsmentioning

confidence: 99%

Investigation of pediatric neck response and muscle activation in low-speed frontal impacts

Dong

Mao

et al. 2014

Computer Methods in Biomechanics and Biomedical Engineering

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Pediatric necks present different responses and injury patterns compared with those of adults in motor vehicle crashes (MVCs). To evaluate the effect of different muscle modeling methodologies, three muscle models were developed and simulated under low-speed frontal impact conditions with an average peak acceleration of 3g's. The muscle activation curve for the curve-guided model, the muscle segment was curved using guiding nodes, was further optimized based on experimental data. The pediatric neck model was also simulated under more severe frontal impact conditions with an average peak acceleration of 8g's. Simulation results revealed that the curve-guided model needed more muscle force than the straight-guided model, in which the muscle segment was straight with guiding nodes, and the curve-constrained model, in which the muscle segment was curved without guiding nodes and which imposes more constraints on the head and neck than the curve-guided model. The predicted head responses for the child finite element neck model were within or close to the experimental corridors of 3- and 8-g's frontal impacts. The neck injuries for a 10-year-old child commonly occurred at the interspinous ligament in the C7-T1 segment. The model could be used to analyze the responses and injuries of pediatric neck and head in low-speed frontal impacts.

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“…Many phenomena can be described in terms of partial differential equations, and the finite element method (FEM) is a numerical approach with which these equations can be solved in approximate terms (Fish and Belytschko, 2009). In recent decades, computational studies using FEM have successfully analyzed biomechanical systems and have made important contributions to understanding the mechanical behavior of the human spine (Cheng et al, 2010;Dong et al, 2013;Fok et al, 2010;Ghista et al, 1988;Kakol et al, 2003;Lan et al, 2013;Lodygwski et al, 2005;Meijer et al, 2010;Rajasekaran et al, 2011;Teo and Ng, 2001;Travert et al, 2011;Tyndyk et al, 2007;Van Der Plaats et al, 2007;Wierszycki et al, 2006;Xia et al, 2003). Over time, different geometric models have been used, including everything from simple versions containing beam elements, represented by interconnected cylinders and bars (Ghista et al, 1988), to more comprehensive volumetric models of the spine.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional geometric model of the middle segment of the thoracic spine based on graphical images for finite element analysis

et al. 2017

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Introduction: Biomedical studies involve complex anatomical structures, which require specific methodology to generate their geometric models. The middle segment of the thoracic spine (T5-T10) is the site of the highest incidence of vertebral deformity in adolescents. Traditionally, its geometries are derived from computed tomography or magnetic resonance imaging data. However, this approach may restrict certain studies. The study aimed to generate two 3D geometric model of the T5-T10 thoracic spine segment, obtained from graphical images, and to create mesh for finite element studies. Methods: A 3D geometric model of T5-T10 was generated using two anatomical images of T6 vertebra (side and top). The geometric model was created in Autodesk  Maya  3D 2013, and the mesh process in HiperMesh and MeshMixer (v11.0.544 Autodesk). Results: The T5-T10 thoracic segment model is presented with its passive components, bones, intervertebral discs and flavum, intertransverse and supraspinous ligaments, in different views, as well as the volumetric mesh. Conclusion: The 3D geometric model generated from graphical images is suitable for application in non-patient-specific finite element model studies or, with restrictions, in the use of computed tomography or magnetic resonance imaging. This model may be useful for biomechanical studies related to the middle thoracic spine, the most vulnerable site for vertebral deformations.Keywords Graphical modeling, Anatomic models, Thoracic spine, Finite element method. This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.How to cite this article: Aroeira RMC, Pertence AEM, Kemmoku DT, Greco M. Three-dimensional geometric model of the middle segment of the thoracic spine based on graphical images for finite element analysis.

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Development and Validation of a 10-Year-Old Child Ligamentous Cervical Spine Finite Element Model

Cited by 57 publications

References 55 publications

Development and Tensile Investigation of a 3-year-old Cervical Spine Finite Element Model

Development and Tensile Investigation of a 3-year-old Cervical Spine Finite Element Model

Investigation of pediatric neck response and muscle activation in low-speed frontal impacts

Three-dimensional geometric model of the middle segment of the thoracic spine based on graphical images for finite element analysis

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