Evaluation of a patient-specific finite-element model to simulate conservative treatment in adolescent idiopathic scoliosis
Vergari, Claudio, Ribes, Gwenael, Aubert, Benjamin, Adam, Clayton, Miladi, Lotfi, Ilharreborde, Brice, Abelin-Genevois, Kariman, Rouch, Philippe, & Skalli, Wafa (2015) Evaluation of a patient-specific finite-element model to simulate conservative treatment in adolescent idiopathic scoliosis. Spine Deformity, 3(1), pp. 4-11.
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2014 04 12 Evaluation method of patient-specific finite element model.pdf. Available under License Creative Commons Attribution Non-commercial No Derivatives 2.5. |
Description
Study design Retrospective validation study. Objectives To propose a method to evaluate, from a clinical standpoint, the ability of a finite-element model (FEM) of the trunk to simulate orthotic correction of spinal deformity and to apply it to validate a previously described FEM. Summary of background data Several FEMs of the scoliotic spine have been described in the literature. These models can prove useful in understanding the mechanisms of scoliosis progression and in optimizing its treatment, but their validation has often been lacking or incomplete. Methods Three-dimensional (3D) geometries of 10 patients before and during conservative treatment were reconstructed from biplanar radiographs. The effect of bracing was simulated by modeling displacements induced by the brace pads. Simulated clinical indices (Cobb angle, T1–T12 and T4–T12 kyphosis, L1–L5 lordosis, apical vertebral rotation, torsion, rib hump) and vertebral orientations and positions were compared to those measured in the patients' 3D geometries. Results Errors in clinical indices were of the same order of magnitude as the uncertainties due to 3D reconstruction; for instance, Cobb angle was simulated with a root mean square error of 5.7°, and rib hump error was 5.6°. Vertebral orientation was simulated with a root mean square error of 4.8° and vertebral position with an error of 2.5 mm. Conclusions The methodology proposed here allowed in-depth evaluation of subject-specific simulations, confirming that FEMs of the trunk have the potential to accurately simulate brace action. These promising results provide a basis for ongoing 3D model development, toward the design of more efficient orthoses.
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ID Code: | 85117 | ||
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Item Type: | Contribution to Journal (Journal Article) | ||
Refereed: | Yes | ||
ORCID iD: |
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Measurements or Duration: | 8 pages | ||
Keywords: | 3D reconstruction, Adolescent idiopathic scoliosis, Biplanar radiography, Brace, Simulation, bracing, finite element, orthotic, scoliosis | ||
DOI: | 10.1016/j.jspd.2014.06.014 | ||
ISSN: | 2212-134X | ||
Pure ID: | 32887431 | ||
Divisions: | Past > Institutes > Institute of Health and Biomedical Innovation Past > QUT Faculties & Divisions > Science & Engineering Faculty |
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Copyright Owner: | Consult author(s) regarding copyright matters | ||
Copyright Statement: | This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au | ||
Deposited On: | 06 Jul 2015 01:42 | ||
Last Modified: | 10 Feb 2025 12:57 |
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