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Published in: BMC Musculoskeletal Disorders 1/2014

Open Access 01-12-2014 | Research article

Design process of cementless femoral stem using a nonlinear three dimensional finite element analysis

Authors: Mohd Yusof Baharuddin, Sh-Hussain Salleh, Ahmad Hafiz Zulkifly, Muhammad Hisyam Lee, Alias Mohd Noor, Arief Ruhullah A Harris, Norazman Abdul Majid, Ab Saman Abd Kader

Published in: BMC Musculoskeletal Disorders | Issue 1/2014

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Abstract

Background

Minimal available information concerning hip morphology is the motivation for several researchers to study the difference between Asian and Western populations. Current use of a universal hip stem of variable size is not the best option for all femur types. This present study proposed a new design process of the cementless femoral stem using a three dimensional model which provided more information and accurate analysis compared to conventional methods.

Methods

This complete design cycle began with morphological analysis, followed by femoral stem design, fit and fill analysis, and nonlinear finite element analysis (FEA). Various femur parameters for periosteal and endosteal canal diameters are measured from the osteotomy level to 150 mm below to determine the isthmus position.

Results

The results showed better total fit (53.7%) and fill (76.7%) canal, with more load distributed proximally to prevent stress shielding at calcar region. The stem demonstrated lower displacement and micromotion (less than 40 μm) promoting osseointegration between the stem–bone and providing primary fixation stability.

Conclusion

This new design process could be used as a preclinical assessment tool and will shorten the design cycle by identifying the major steps which must be taken while designing the femoral stem.
Appendix
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Metadata
Title
Design process of cementless femoral stem using a nonlinear three dimensional finite element analysis
Authors
Mohd Yusof Baharuddin
Sh-Hussain Salleh
Ahmad Hafiz Zulkifly
Muhammad Hisyam Lee
Alias Mohd Noor
Arief Ruhullah A Harris
Norazman Abdul Majid
Ab Saman Abd Kader
Publication date
01-12-2014
Publisher
BioMed Central
Published in
BMC Musculoskeletal Disorders / Issue 1/2014
Electronic ISSN: 1471-2474
DOI
https://doi.org/10.1186/1471-2474-15-30

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