AI Article Synopsis
- The finite element method (FEM) is used to create a detailed 3D model of the upper cervical spine, based on CT scan data, to study the impact of ligaments and facet joints on its stability.
- Results indicate that the C1-C2 segment is more flexible than C2-C3, and the study computed stress levels on ligaments and facet joints during different movements.
- Key findings highlight that the anterior longitudinal ligaments and interspinous ligaments are the most active, with maximum stress occurring on the C3 superior facet surface during extension and flexion.
Article Abstract
Background: The finite element method (FEM) is an efficient and powerful tool for studying human spine biomechanics.
Objective: In this study, a detailed asymmetric three-dimensional (3D) finite element (FE) model of the upper cervical spine was developed from the computed tomography (CT) scan data to analyze the effect of ligaments and facet joints on the stability of the upper cervical spine.
Methods: A 3D FE model was validated against data obtained from previously published works, which were performed in vitro and FE analysis of vertebrae under three types of loads, i.e. flexion/extension, axial rotation, and lateral bending.
Results: The results show that the range of motion of segment C1-C2 is more flexible than that of segment C2-C3. Moreover, the results from the FE model were used to compute stresses on the ligaments and facet joints of the upper cervical spine during physiological moments.
Conclusion: The anterior longitudinal ligaments (ALL) and interspinous ligaments (ISL) are found to be the most active ligaments, and the maximum stress distribution is appear on the vertebra C3 superior facet surface under both extension and flexion moments.
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| http://dx.doi.org/10.3233/BME-211247 | DOI Listing |
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