Comparison of various functionally graded femoral prostheses by finite element analysis

Azim Ataollahi Oshkour, Hossein Talebi, Seyed Farid Seyed Shirazi, Mehdi Bayat, Yat Huang Yau, Faris Tarlochan, Noor Azuan Abu Osman

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

16 Citationer (Scopus)

Abstract

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.

OriginalsprogEngelsk
Artikelnummer807621
TidsskriftScientific World Journal
Vol/bind2014
Antal sider17
ISSN2356-6140
DOI
StatusUdgivet - 2014

Fingeraftryk

Dyk ned i forskningsemnerne om 'Comparison of various functionally graded femoral prostheses by finite element analysis'. Sammen danner de et unikt fingeraftryk.

Citationsformater