Cover Image

Interface micromotion of cementless hip stems in simulated hip arthroplasty

Problem statement: The design of hip prostheses has evolved over time due to various complications found after hip replacement surgery. The currently commercially available cementless femoral stems can be categorized into one of three major types, straight cylindrical, tapered rectangular and anatom...

Full description

Saved in:
Bibliographic Details
Main Authors: Abdul-Kadir, Mohammed Rafiq, Kamsah, Nazri
Format: Article
Published: Science Publications 2009
Subjects:
TJ Mechanical engineering and machinery
Online Access:http://eprints.utm.my/id/eprint/12899/
http://dx.doi.org/10.3844/ajassp.2009.1682.1689
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.utm.12899
record_format eprints
spelling my.utm.128992011-07-06T01:32:45Z http://eprints.utm.my/id/eprint/12899/ Interface micromotion of cementless hip stems in simulated hip arthroplasty Abdul-Kadir, Mohammed Rafiq Kamsah, Nazri TJ Mechanical engineering and machinery Problem statement: The design of hip prostheses has evolved over time due to various complications found after hip replacement surgery. The currently commercially available cementless femoral stems can be categorized into one of three major types, straight cylindrical, tapered rectangular and anatomical. Each type proposes a unique concept to achieve primary stability-a major requirement for bone healing process. Virtual analyses have been made on individual implants, but comparison between the three major types is required to determine the strength and weaknesses of the design concepts. Approach: Three types of implants were modeled in three dimensions-the straight cylindrical, rectangular taper and anatomical. The size of the three implants was carefully designed to fit and fill the canal of a femur reconstructed from a computed tomography image dataset. Hip arthroplasty was simulated virtually by inserting the hip stem into the femoral canal. Finite element method was used in conjunction with a specialized sub-routine to measure micromotion at the bone-implant interface under loads simulating physiological walking and stair-climbing. Another sub-routine was used to assign bone properties based on the grayscale values of the CT image. Results: All the three types of cementless hip stems were found to be stable under both walking and stair climbing activities. Large micromotion values concentrated around the proximal and distal part of the stems. Conclusion/Recommendations: The three major types of hip stems were compared in this study and all of them were found to be stable after simulated physiological activities. Science Publications 2009 Article PeerReviewed Abdul-Kadir, Mohammed Rafiq and Kamsah, Nazri (2009) Interface micromotion of cementless hip stems in simulated hip arthroplasty. American Journal of Applied Sciences . pp. 1682-1689. ISSN 1546-9239 http://dx.doi.org/10.3844/ajassp.2009.1682.1689 doi:10.3844/ajassp.2009.1682.1689
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Abdul-Kadir, Mohammed Rafiq
Kamsah, Nazri
Interface micromotion of cementless hip stems in simulated hip arthroplasty
description Problem statement: The design of hip prostheses has evolved over time due to various complications found after hip replacement surgery. The currently commercially available cementless femoral stems can be categorized into one of three major types, straight cylindrical, tapered rectangular and anatomical. Each type proposes a unique concept to achieve primary stability-a major requirement for bone healing process. Virtual analyses have been made on individual implants, but comparison between the three major types is required to determine the strength and weaknesses of the design concepts. Approach: Three types of implants were modeled in three dimensions-the straight cylindrical, rectangular taper and anatomical. The size of the three implants was carefully designed to fit and fill the canal of a femur reconstructed from a computed tomography image dataset. Hip arthroplasty was simulated virtually by inserting the hip stem into the femoral canal. Finite element method was used in conjunction with a specialized sub-routine to measure micromotion at the bone-implant interface under loads simulating physiological walking and stair-climbing. Another sub-routine was used to assign bone properties based on the grayscale values of the CT image. Results: All the three types of cementless hip stems were found to be stable under both walking and stair climbing activities. Large micromotion values concentrated around the proximal and distal part of the stems. Conclusion/Recommendations: The three major types of hip stems were compared in this study and all of them were found to be stable after simulated physiological activities.
format Article
author Abdul-Kadir, Mohammed Rafiq
Kamsah, Nazri
author_facet Abdul-Kadir, Mohammed Rafiq
Kamsah, Nazri
author_sort Abdul-Kadir, Mohammed Rafiq
title Interface micromotion of cementless hip stems in simulated hip arthroplasty
title_short Interface micromotion of cementless hip stems in simulated hip arthroplasty
title_full Interface micromotion of cementless hip stems in simulated hip arthroplasty
title_fullStr Interface micromotion of cementless hip stems in simulated hip arthroplasty
title_full_unstemmed Interface micromotion of cementless hip stems in simulated hip arthroplasty
title_sort interface micromotion of cementless hip stems in simulated hip arthroplasty
publisher Science Publications
publishDate 2009
url http://eprints.utm.my/id/eprint/12899/
http://dx.doi.org/10.3844/ajassp.2009.1682.1689
_version_ 1643646064714055680
score 13.211869

Similar Items