Alternative designs of load−sharing cobalt chromium graded femoral stems

© 2017 Elsevier Ltd The incapability of controlling relative micromotions and load transfers to a peri-prosthetic femur shortens implant longevity. This study aims to evaluate the possibility of applying graded porous cobalt chromium (CoCr) to cementless femoral stems. 3D finite element analyses an...

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Main Authors: Limmahakhun S., Oloyede A., Chantarapanich N., Jiamwatthanachai P., Sitthiseripratip K., Xiao Y., Yan C.
Format: Journal
Published: 2017
Online Access:https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85019859852&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/40153
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-401532017-09-28T04:07:16Z Alternative designs of load−sharing cobalt chromium graded femoral stems Limmahakhun S. Oloyede A. Chantarapanich N. Jiamwatthanachai P. Sitthiseripratip K. Xiao Y. Yan C. © 2017 Elsevier Ltd The incapability of controlling relative micromotions and load transfers to a peri-prosthetic femur shortens implant longevity. This study aims to evaluate the possibility of applying graded porous cobalt chromium (CoCr) to cementless femoral stems. 3D finite element analyses and physical testings of hip implants were conducted with four different grading orientations, along the axial and radial planes of the femoral stem. The results show that the CoCr graded femoral stems with a porosity decreased caudally and inwardly may control the relative micromotions in an acceptable range for bone ingrowth, significantly increase stress transfers on the Gruen zone 1 and 7, and attain the flexural stiffness comparable to human femurs. Therefore, CoCr graded femoral stems demonstrate great potential for applications in implants with reduced stress shielding and improved long-term survival rates. 2017-09-28T04:07:16Z 2017-09-28T04:07:16Z Journal 2-s2.0-85019859852 10.1016/j.mtcomm.2017.05.002 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85019859852&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/40153
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
description © 2017 Elsevier Ltd The incapability of controlling relative micromotions and load transfers to a peri-prosthetic femur shortens implant longevity. This study aims to evaluate the possibility of applying graded porous cobalt chromium (CoCr) to cementless femoral stems. 3D finite element analyses and physical testings of hip implants were conducted with four different grading orientations, along the axial and radial planes of the femoral stem. The results show that the CoCr graded femoral stems with a porosity decreased caudally and inwardly may control the relative micromotions in an acceptable range for bone ingrowth, significantly increase stress transfers on the Gruen zone 1 and 7, and attain the flexural stiffness comparable to human femurs. Therefore, CoCr graded femoral stems demonstrate great potential for applications in implants with reduced stress shielding and improved long-term survival rates.
format Journal
author Limmahakhun S.
Oloyede A.
Chantarapanich N.
Jiamwatthanachai P.
Sitthiseripratip K.
Xiao Y.
Yan C.
spellingShingle Limmahakhun S.
Oloyede A.
Chantarapanich N.
Jiamwatthanachai P.
Sitthiseripratip K.
Xiao Y.
Yan C.
Alternative designs of load−sharing cobalt chromium graded femoral stems
author_facet Limmahakhun S.
Oloyede A.
Chantarapanich N.
Jiamwatthanachai P.
Sitthiseripratip K.
Xiao Y.
Yan C.
author_sort Limmahakhun S.
title Alternative designs of load−sharing cobalt chromium graded femoral stems
title_short Alternative designs of load−sharing cobalt chromium graded femoral stems
title_full Alternative designs of load−sharing cobalt chromium graded femoral stems
title_fullStr Alternative designs of load−sharing cobalt chromium graded femoral stems
title_full_unstemmed Alternative designs of load−sharing cobalt chromium graded femoral stems
title_sort alternative designs of load−sharing cobalt chromium graded femoral stems
publishDate 2017
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85019859852&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/40153
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