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Multiobjective shape optimization strategy to increase performance of hollow stems used in artificially replaced hip joints

Kharmanda, Ghias LU ; Antypas, Imad and Dyachenko, Alexey (2018) In International Journal of Mechanical Engineering and Technology 9(11). p.810-820
Abstract

The artificial replaced hip joint represents the major success story in orthopedic surgery in the twentieth century; there is much interest in extending research on hip joint even further. The stress distribution in the different bone tissues of a femur is significantly altered after an artificial replacement. Thus, there is a strong need to increase the prosthesis performance considering several criteria. A new multiobjective shape ptimization strategy is presented to increase the performance of the hollow stems used in the artificially replaced hip joints. Two stem models are considered in this study: solid and hollow stems. The shape optimization presents the detailed design stage when studying the hip prostheses in order to improve... (More)

The artificial replaced hip joint represents the major success story in orthopedic surgery in the twentieth century; there is much interest in extending research on hip joint even further. The stress distribution in the different bone tissues of a femur is significantly altered after an artificial replacement. Thus, there is a strong need to increase the prosthesis performance considering several criteria. A new multiobjective shape ptimization strategy is presented to increase the performance of the hollow stems used in the artificially replaced hip joints. Two stem models are considered in this study: solid and hollow stems. The shape optimization presents the detailed design stage when studying the hip prostheses in order to improve their performance. Several objectives are considered, that leads to develop a new multiplicative formulation as a performance scale to define the best compromise between several requirements. Numerical applications considering several daily loading cases, is presented out to show the advantages of the hollow stem model relative to the solid one. When considering the hollow stem, the developed multiobjective function is reduced almost 46% relative to the solid stem. It is shown that from an optimization of the stress levels using a new goal function and considering several daily loading ases, it is concluded that it is possible to obtain a more uniform stress distribution. In addition, it is found that a significant increase of the stress levels around the metal/bone interface is obtained, leading to favorable remodeling process.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Hip prosthesis, Hollow stem, Shape optimization, Solid stem
in
International Journal of Mechanical Engineering and Technology
volume
9
issue
11
pages
810 - 820
external identifiers
  • scopus:85057561452
ISSN
0976-6340
language
English
LU publication?
yes
id
23fdbdec-d0f2-4881-959f-99050f269887
date added to LUP
2018-12-21 09:55:38
date last changed
2019-02-20 11:40:40
@article{23fdbdec-d0f2-4881-959f-99050f269887,
  abstract     = {<p>The artificial replaced hip joint represents the major success story in orthopedic surgery in the twentieth century; there is much interest in extending research on hip joint even further. The stress distribution in the different bone tissues of a femur is significantly altered after an artificial replacement. Thus, there is a strong need to increase the prosthesis performance considering several criteria. A new multiobjective shape ptimization strategy is presented to increase the performance of the hollow stems used in the artificially replaced hip joints. Two stem models are considered in this study: solid and hollow stems. The shape optimization presents the detailed design stage when studying the hip prostheses in order to improve their performance. Several objectives are considered, that leads to develop a new multiplicative formulation as a performance scale to define the best compromise between several requirements. Numerical applications considering several daily loading cases, is presented out to show the advantages of the hollow stem model relative to the solid one. When considering the hollow stem, the developed multiobjective function is reduced almost 46% relative to the solid stem. It is shown that from an optimization of the stress levels using a new goal function and considering several daily loading ases, it is concluded that it is possible to obtain a more uniform stress distribution. In addition, it is found that a significant increase of the stress levels around the metal/bone interface is obtained, leading to favorable remodeling process.</p>},
  author       = {Kharmanda, Ghias and Antypas, Imad and Dyachenko, Alexey},
  issn         = {0976-6340},
  keyword      = {Hip prosthesis,Hollow stem,Shape optimization,Solid stem},
  language     = {eng},
  number       = {11},
  pages        = {810--820},
  series       = {International Journal of Mechanical Engineering and Technology},
  title        = {Multiobjective shape optimization strategy to increase performance of hollow stems used in artificially replaced hip joints},
  volume       = {9},
  year         = {2018},
}