Sensitivity analysis of a cemented hip stem to implant position and cement mantle thickness
(2014) In Computer Methods in Biomechanics and Biomedical Engineering 17(15). p.1671-1684- Abstract
- Patient-specific finite element models of the implanted proximal femur can be built from pre-operative computed tomography scans and post-operative X-rays. However, estimating three-dimensional positioning from two-dimensional radiographs introduces uncertainty in the implant position. Further, accurately measuring the thin cement mantle and the degree of cement-bone interdigitation from imaging data is challenging. To quantify the effect of these uncertainties in stem position and cement thickness, a sensitivity study was performed. A design-of-experiment study was implemented, simulating both gait and stair ascent. Cement mantle stresses and bone-implant interface strains were monitored. The results show that small variations in... (More)
- Patient-specific finite element models of the implanted proximal femur can be built from pre-operative computed tomography scans and post-operative X-rays. However, estimating three-dimensional positioning from two-dimensional radiographs introduces uncertainty in the implant position. Further, accurately measuring the thin cement mantle and the degree of cement-bone interdigitation from imaging data is challenging. To quantify the effect of these uncertainties in stem position and cement thickness, a sensitivity study was performed. A design-of-experiment study was implemented, simulating both gait and stair ascent. Cement mantle stresses and bone-implant interface strains were monitored. The results show that small variations in alignment affect the implant biomechanics, especially around the most proximal and most distal ends of the stem. The results suggest that implant position is more influential than cement thickness. Rotation around the medial-lateral axis is the dominant factor in the proximal zones and stem translations are the dominant factors around the distal tip. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4548086
- author
- Shi, J. ; Browne, M. ; Strickland, M. ; Flivik, Gunnar LU and Taylor, M.
- organization
- publishing date
- 2014
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- total hip replacement, sensitivity, finite element analysis, design-of-experiment, implant alignment
- in
- Computer Methods in Biomechanics and Biomedical Engineering
- volume
- 17
- issue
- 15
- pages
- 1671 - 1684
- publisher
- Taylor & Francis
- external identifiers
-
- wos:000337530300004
- scopus:84901626202
- pmid:23405986
- ISSN
- 1025-5842
- DOI
- 10.1080/10255842.2012.761693
- language
- English
- LU publication?
- yes
- id
- bcb60bc8-d4be-4680-bb27-4cd6873df6dd (old id 4548086)
- date added to LUP
- 2016-04-01 09:57:10
- date last changed
- 2022-03-27 03:26:39
@article{bcb60bc8-d4be-4680-bb27-4cd6873df6dd,
abstract = {{Patient-specific finite element models of the implanted proximal femur can be built from pre-operative computed tomography scans and post-operative X-rays. However, estimating three-dimensional positioning from two-dimensional radiographs introduces uncertainty in the implant position. Further, accurately measuring the thin cement mantle and the degree of cement-bone interdigitation from imaging data is challenging. To quantify the effect of these uncertainties in stem position and cement thickness, a sensitivity study was performed. A design-of-experiment study was implemented, simulating both gait and stair ascent. Cement mantle stresses and bone-implant interface strains were monitored. The results show that small variations in alignment affect the implant biomechanics, especially around the most proximal and most distal ends of the stem. The results suggest that implant position is more influential than cement thickness. Rotation around the medial-lateral axis is the dominant factor in the proximal zones and stem translations are the dominant factors around the distal tip.}},
author = {{Shi, J. and Browne, M. and Strickland, M. and Flivik, Gunnar and Taylor, M.}},
issn = {{1025-5842}},
keywords = {{total hip replacement; sensitivity; finite element analysis; design-of-experiment; implant alignment}},
language = {{eng}},
number = {{15}},
pages = {{1671--1684}},
publisher = {{Taylor & Francis}},
series = {{Computer Methods in Biomechanics and Biomedical Engineering}},
title = {{Sensitivity analysis of a cemented hip stem to implant position and cement mantle thickness}},
url = {{http://dx.doi.org/10.1080/10255842.2012.761693}},
doi = {{10.1080/10255842.2012.761693}},
volume = {{17}},
year = {{2014}},
}