In Silico Pelvis and Sacroiliac Joint Motion: Refining a Model of the Human Osteoligamentous Pelvis for Assessing Physiological Load Deformation Using an Inverted Validation Approach

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aut.relation.journalBioMed Research Internationalen_NZ
aut.relation.volume2019en_NZ
aut.researcherHutcheson, Catherine
dc.contributor.authorRamezani, Men_NZ
dc.contributor.authorKlima, Sen_NZ
dc.contributor.authorDe La Herverie, PLCen_NZ
dc.contributor.authorCampo, Jen_NZ
dc.contributor.authorLe Joncour, JBen_NZ
dc.contributor.authorRouquette, Cen_NZ
dc.contributor.authorScholze, Men_NZ
dc.contributor.authorHammer, Nen_NZ
dc.date.accessioned2020-07-12T22:17:20Z
dc.date.available2020-07-12T22:17:20Z
dc.date.copyright2019en_NZ
dc.date.issued2019en_NZ
dc.description.abstractIntroduction. Computational modeling of the human pelvis using the finite elements (FE) method has become increasingly important to understand the mechanisms of load distribution under both healthy and pathologically altered conditions and to develop and assess novel treatment strategies. The number of accurate and validated FE models is however small, and given models fail resembling the physiologic joint motion in particular of the sacroiliac joint. This study is aimed at using an inverted validation approach, using in vitro load deformation data to refine an existing FE model under the same mode of load application and to parametrically assess the influence of altered morphology and mechanical data on the kinematics of the model. Materials and Methods. An osteoligamentous FE model of the pelvis including the fifth lumbar vertebra was used, with highly accurate representations of ligament orientations. Material properties were altered parametrically for bone, cartilage, and ligaments, followed by changes in bone geometry (solid versus 3 and 2 mm shell) and material models (linear elastic, viscoelastic, and hyperelastic isotropic), and the effects of varying ligament fiber orientations were assessed. Results. Elastic modulus changes were more decisive in both linear elastic and viscoelastic bone, cartilage, and ligaments models, especially if shell geometries were used for the pelvic bones. Viscoelastic material properties gave more realistic results. Surprisingly little change was observed as a consequence of altering SIJ ligament orientations. Validation with in vitro experiments using cadavers showed close correlations for movements especially for 3 mm shell viscoelastic model. Discussion. This study has used an inverted validation approach to refine an existing FE model, to give realistic and accurate load deformation data of the osteoligamentous pelvis and showed which variation in the outcomes of the models are attributed to altered material properties and models. The given approach furthermore shows the value of accurate validation and of using the validation data to fine tune FE models.en_NZ
dc.identifier.citationBioMed Research International, Volume 2019, Article ID 3973170, 12 pages, https://doi.org/10.1155/2019/3973170
dc.identifier.doi10.1155/2019/3973170en_NZ
dc.identifier.issn2314-6133en_NZ
dc.identifier.issn2314-6141en_NZ
dc.identifier.urihttps://hdl.handle.net/10292/13518
dc.publisherHindawi
dc.relation.urihttps://www.hindawi.com/journals/bmri/2019/3973170/
dc.rightsCopyright © 2019 Maziar Ramezani et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
dc.rights.accessrightsOpenAccessen_NZ
dc.titleIn Silico Pelvis and Sacroiliac Joint Motion: Refining a Model of the Human Osteoligamentous Pelvis for Assessing Physiological Load Deformation Using an Inverted Validation Approachen_NZ
dc.typeJournal Article
pubs.elements-id356684
pubs.organisational-data/AUT
pubs.organisational-data/AUT/Design & Creative Technologies
pubs.organisational-data/AUT/Design & Creative Technologies/Engineering, Computer & Mathematical Sciences
pubs.organisational-data/AUT/PBRF
pubs.organisational-data/AUT/PBRF/PBRF Design and Creative Technologies
pubs.organisational-data/AUT/PBRF/PBRF Design and Creative Technologies/PBRF ECMS
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