Title

EFFECTS OF HETEROGENEITY AND ANISOTROPY OF BONE ON STRESSES IN A PROSTHETICALLY RESURFACED TIBIA- AN AXISYMMETRIC MODEL WITH NON-AXISYMMETRIC LOADING.

Abstract

Finite element models of the prosthetically resurfaced tibia have included the anisotropic and heterogeneous properties of the cortical bone, but have for the most part not included such details for the cancellous bone or for the cement-bone composite. The purpose of the work presented here is to include these details in an axisymmetric model and to examine the effects of heterogeneity and anisotropy on the stress distribution in the tibia and, in particular, at the cement-bone/bone interface. The result of experiments shows that anisotropy has a more pronounced effect on the stress distribution than heterogeneity. In general, it appears that including anisotropy causes the stress distribution in the finite element models of the prosthetically resurfaced tibia to approach that of the natural tibia.

Publication Title

American Society of Mechanical Engineers, Bioengineering Division (Publication) BED

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