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Comparison of various functionally graded femoral prostheses by finite element analysis

  • This study is focused on finite element analysis of a model comprising femur into which a femoral component of a total hip replacement was implanted. The considered prosthesis is fabricated from a functionally graded material (FGM) comprising a layer of a titanium alloy bonded to a layer of hydroxyapatite. The elastic modulus of the FGM was adjusted in the radial, longitudinal, and longitudinal-radial directions by altering the volume fraction gradient exponent. Four cases were studied, involving two different methods of anchoring the prosthesis to the spongy bone and two cases of applied loading. The results revealed that the FG prostheses provoked more SED to the bone. The FG prostheses carried less stress, while more stress was induced to the bone and cement. Meanwhile, less shear interface stress was stimulated to the prosthesis-bone interface in the noncemented FG prostheses. The cement-bone interface carried more stress compared to the prosthesis-cement interface. Stair climbing induced more harmful effects to the implanted femur components compared to the normal walking by causing more stress. Therefore, stress shielding, developed stresses, and interface stresses in the THR components could be adjusted through the controlling stiffness of the FG prosthesis by managing volume fraction gradient exponent.

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Document Type:Article
Author: Azim Ataollahi Oshkour, Hossein Talebi, Seyed Farid Seyed Shirazi, Mehdi Bayat, Yat Huang Yau, Faris Tarlochan, Noor Azuan Abu Osman
DOI (Cite-Link):https://doi.org/10.1155/2014/807621Cite-Link
URN (Cite-Link):https://nbn-resolving.org/urn:nbn:de:gbv:wim2-20170413-31194Cite-Link
Parent Title (English):Scientific World Journal
Date of Publication (online):2017/04/13
Year of first Publication:2014
Release Date:2017/04/13
Publishing Institution:Bauhaus-Universität Weimar
Institutes:Fakultät Bauingenieurwesen / Graduiertenkolleg 1462
GND Keyword:Finite-Elemente-Methode; Hüftgelenk; Funktioneller Gradientenwerkstoff
Dewey Decimal Classification:000 Informatik, Informationswissenschaft, allgemeine Werke / 000 Informatik, Wissen, Systeme
BKL-Classification:44 Medizin / 44.83 Rheumatologie, Orthopädie
54 Informatik / 54.80 Angewandte Informatik
Licence (German):License Logo Creative Commons 4.0 - Namensnennung (CC BY 4.0)