An extended discrete element method for the estimation of contact pressure at the ankle joint during stance phase.
Extended discrete element analysis
ankle
contact pressure
nonlinear stiffness
subject specific
Journal
Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine
ISSN: 2041-3033
Titre abrégé: Proc Inst Mech Eng H
Pays: England
ID NLM: 8908934
Informations de publication
Date de publication:
May 2020
May 2020
Historique:
pubmed:
11
2
2020
medline:
27
1
2021
entrez:
11
2
2020
Statut:
ppublish
Résumé
Abnormalities in the ankle contact pressure are related to the onset of osteoarthritis. In vivo measurements are not possible with currently available techniques, so computational methods such as the finite element analysis (FEA) are often used instead. The discrete element method (DEM), a computationally efficient alternative to time-consuming FEA, has also been used to predict the joint contact pressure. It describes the articular cartilage as a bed of independent springs, assuming a linearly elastic behaviour and absence of relative motion between the bones. In this study, we present the extended DEM (EDEM) which is able to track the motion of talus over time. The method was used, with input data from a subject-specific musculoskeletal model, to predict the contact pressure in the ankle joint during gait. Results from EDEM were also compared with outputs from conventional DEM. Predicted values of contact area were larger in EDEM than they were in DEM (4.67 and 4.18 cm
Identifiants
pubmed: 32036769
doi: 10.1177/0954411920905434
pmc: PMC7469707
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
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