Evaluation of some deformation and strength characteristics of compact bone tissue according to the data of a biochemical study

Pfafrod, G. O.; Slutskii, L. I.; Moorlat, P. A.; Knēts, Ivars

doi:10.1007/bf00856495

Cited by 2 publications

(1 citation statement)

References 9 publications

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“…The diaphysis was divided into six radial regions ( Figure 3) in order to apply the inhomogeneous and anisotropic properties as described by Knets et al and Pfafrod et al [9,19] …”

Section: Model Formationmentioning

confidence: 99%

Relevance of inhomogeneous–anisotropic models of human cortical bone: a tibia study using the finite element method

Ün

Çalık

2016

Biotechnology & Biotechnological Equipment

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Cortical bone is an inhomogeneous and anisotropic tissue subjected to large loads during typical daily activities. While studies assuming isotropic material properties are frequent, anisotropy and inhomogeneity of cortical bone have been rarely taken into account. Moreover, the question, whether an assumption of anisotropy and inhomogeneity has an impact in the mechanical analysis of cortical bone, has not been explored in the literature. This study explores the relevance of anisotropy in human cortical bone. The cortical bone model has been divided into six radial regions and a different set of orthotropic material properties has been assigned to each region. This inhomogeneous and anisotropic elastic tibia model has been compared with a corresponding isotropic model under various loading modes using the finite element method. In particular, the variation in the maximum von Mises stress and strain values has been observed along the bone axis. We have observed that the isotropic model may overestimate the maximum von Mises strain up to 15% under pure compression and underestimate up to 50% under pure torsion relative to the inhomogeneousÀanisotropic model. Our results suggest that consideration of anisotropy and inhomogeneity of the bone may make a significant difference in the predicted maximum von Mises strain values, which can be important for strain-based damage accumulation studies and fracture risk evaluation.

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“…The diaphysis was divided into six radial regions ( Figure 3) in order to apply the inhomogeneous and anisotropic properties as described by Knets et al and Pfafrod et al [9,19] …”

Section: Model Formationmentioning

confidence: 99%

Relevance of inhomogeneous–anisotropic models of human cortical bone: a tibia study using the finite element method

Ün

Çalık

2016

Biotechnology & Biotechnological Equipment

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Finite Element Analysis of Human Tibia Modeled as a Functionally Graded Material

Tiwari

Wahi

Sinha

2019

Journal of Engineering and Science in Medical Diagnostics and Therapy

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Human tibia, the second largest bone in human body, is made of complex biological material having inhomogeneity and anisotropy in such a manner that makes it a functionally graded material. While analyses of human tibia assuming it to be made of different material regions have been attempted in past, functionally graded nature of the bone in the mechanical analysis has not been considered. This study highlights the importance of functional grading of material properties in capturing the correct stress distribution from the finite element analysis (FEA) of human tibia under static loading. Isotropic and orthotropic material properties of different regions of human tibia have been graded functionally in three different manners and assigned to the tibia model. The nonfunctionally graded and functionally graded models of tibia have been compared with each other. It was observed that the model in which functional grading was not performed, uneven distribution and unrealistic spikes of stresses occurred at the interfaces of different material regions. On the contrary, the models with functional grading were free from this potential artifact. Hence, our analysis suggests that functional grading is essential for predicting the actual distribution of stresses in the entire bone, which is important for biomechanical analysis. We find that orthotropic nature of the bone tends to increase the maximum von Mises stress in the entire tibia, while inclusion of cross-sectional inhomogeneity typically increases the stresses across normal cross section. Accordingly, our analysis suggests that both orthotropy as well as cross-sectional inhomogeneity should be included to correctly capture the stress distribution in the bone.

show abstract

Evaluation of some deformation and strength characteristics of compact bone tissue according to the data of a biochemical study

Cited by 2 publications

References 9 publications

Relevance of inhomogeneous–anisotropic models of human cortical bone: a tibia study using the finite element method

Relevance of inhomogeneous–anisotropic models of human cortical bone: a tibia study using the finite element method

Finite Element Analysis of Human Tibia Modeled as a Functionally Graded Material

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