A finite element model for evaluation of tibial prosthesis-bone interface in total knee replacement

Détails

ID Serval
serval:BIB_35B9E435DF08
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
A finite element model for evaluation of tibial prosthesis-bone interface in total knee replacement
Périodique
Journal of Biomechanics
Auteur⸱e⸱s
Rakotomanana  R. L., Leyvraz  P. F., Curnier  A., Heegaard  J. H., Rubin  P. J.
ISSN
0021-9290 (Print)
Statut éditorial
Publié
Date de publication
12/1992
Volume
25
Numéro
12
Pages
1413-24
Notes
Journal Article --- Old month value: Dec
Résumé
A numerical model based on the finite element method was developed for the load transfer analysis at the tibial bone-implant interfaces in total knee replacement. A transverse isotropic material model, based on a quadratic elastic potential and on Hill's quadratic yield criterion, was next developed for bone constitutive laws. The bone-cement and bone-prosthesis interfaces were both assumed to be discontinuous. A dry friction model based on Coulomb's criterion was adopted for the interfaces friction. The model was shown to be able to give compressive and shear stresses distributions and distractive and relative shear micromotions at these interfaces. A preliminary application was conducted for cemented metal tray total condylar (MTTC) and for cemented and uncemented porous coated anatomic (PCA) tibial plateaus. The PCA plateaus were found to be more deformable and had greater global displacements than the MTTC one. Debonding of the bone-peg interface was observed for the uncemented PCA. Correspondingly, the stress peaks at the interface beneath the tray were lower for the uncemented PCA. Correspondingly, the stress peaks at the interface beneath the tray were lower for the PCA than for the MTTC. Shear micromotions appeared under the tray for both the two prostheses. We observed that bone anisotropy and interface discontinuity affected the results sensibly.
Mots-clé
Alloys/chemistry Biomechanics Bone Cements/chemistry Elasticity Humans *Knee Prosthesis Mathematics *Models, Biological Movement Stress, Mechanical Surface Properties Tensile Strength Tibia/anatomy & histology/*physiology
Pubmed
Web of science
Création de la notice
28/01/2008 13:22
Dernière modification de la notice
20/08/2019 14:23
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