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

Details

Serval ID
serval:BIB_35B9E435DF08
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
A finite element model for evaluation of tibial prosthesis-bone interface in total knee replacement
Journal
Journal of Biomechanics
Author(s)
Rakotomanana  R. L., Leyvraz  P. F., Curnier  A., Heegaard  J. H., Rubin  P. J.
ISSN
0021-9290 (Print)
Publication state
Published
Issued date
12/1992
Volume
25
Number
12
Pages
1413-24
Notes
Journal Article --- Old month value: Dec
Abstract
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.
Keywords
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
Create date
28/01/2008 13:22
Last modification date
20/08/2019 14:23
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