Preliminary results on the effects of orthopedic implant stiffness fixed to the cut end of the femur on the stress at the stump-prosthetic interface

A lot of trans-femoral amputation patients experience skin breakdown due to the pressures and shear stresses in the stump-prosthesis interface. In this study, a finite element model was employed to investigate the stresses at the stump interface in the case of an orthopedic implant fixed to the cut...

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Autores principales:	Ismail Boudjemaa, A. Sahli, A. Benkhettou, S. Benbarek
Formato:	article
Lenguaje:	EN
Publicado:	Gruppo Italiano Frattura 2021
Materias:	Prosthesis Stump interface Stiffness Contacts stresses Implant Mechanical engineering and machinery TJ1-1570 Structural engineering (General) TA630-695
Acceso en línea:	https://doaj.org/article/0c9dce2066534a70a9b8a87bf8b87744
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spelling	oai:doaj.org-article:0c9dce2066534a70a9b8a87bf8b877442021-11-26T10:56:23ZPreliminary results on the effects of orthopedic implant stiffness fixed to the cut end of the femur on the stress at the stump-prosthetic interface1971-8993https://doaj.org/article/0c9dce2066534a70a9b8a87bf8b877442021-06-01T00:00:00Zhttps://www.fracturae.com/index.php/fis/article/view/3074https://doaj.org/toc/1971-8993 A lot of trans-femoral amputation patients experience skin breakdown due to the pressures and shear stresses in the stump-prosthesis interface. In this study, a finite element model was employed to investigate the stresses at the stump interface in the case of an orthopedic implant fixed to the cut end of the femur. By changing the stiffness of this implant, we aim to see how the stiffness of this implant affects the stresses in the interface between the amputated limb and the prosthesis. To find out the effects of implant stiffness, five values for the elastic modulus, ranging from 0.1 to 0.5 Mpa, with an interval of 0.1 Mpa were employed in the implant structure of the FE model. Obtained results show that the implant played important role in reducing the stresses at the stump-prosthesis interface where the contact pressure did not exceed 53 Kpa and 17.3 Kpa for shear stress in the stiffer case of an implant, while the contact pressure in the case of femur without implant exceeded 79Kpa and 42 Kpa for shear stress. We also noted that the intensity of the contact pressure and the shear stress is proportional to the stiffness of the implant, as the greater the implant stiffness, the higher the peak of these stresses. Ismail BoudjemaaA. SahliA. BenkhettouS. BenbarekGruppo Italiano FratturaarticleProsthesisStump interfaceStiffnessContacts stressesImplantMechanical engineering and machineryTJ1-1570Structural engineering (General)TA630-695ENFrattura ed Integrità Strutturale, Vol 15, Iss 57 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Prosthesis Stump interface Stiffness Contacts stresses Implant Mechanical engineering and machinery TJ1-1570 Structural engineering (General) TA630-695
spellingShingle	Prosthesis Stump interface Stiffness Contacts stresses Implant Mechanical engineering and machinery TJ1-1570 Structural engineering (General) TA630-695 Ismail Boudjemaa A. Sahli A. Benkhettou S. Benbarek Preliminary results on the effects of orthopedic implant stiffness fixed to the cut end of the femur on the stress at the stump-prosthetic interface
description	A lot of trans-femoral amputation patients experience skin breakdown due to the pressures and shear stresses in the stump-prosthesis interface. In this study, a finite element model was employed to investigate the stresses at the stump interface in the case of an orthopedic implant fixed to the cut end of the femur. By changing the stiffness of this implant, we aim to see how the stiffness of this implant affects the stresses in the interface between the amputated limb and the prosthesis. To find out the effects of implant stiffness, five values for the elastic modulus, ranging from 0.1 to 0.5 Mpa, with an interval of 0.1 Mpa were employed in the implant structure of the FE model. Obtained results show that the implant played important role in reducing the stresses at the stump-prosthesis interface where the contact pressure did not exceed 53 Kpa and 17.3 Kpa for shear stress in the stiffer case of an implant, while the contact pressure in the case of femur without implant exceeded 79Kpa and 42 Kpa for shear stress. We also noted that the intensity of the contact pressure and the shear stress is proportional to the stiffness of the implant, as the greater the implant stiffness, the higher the peak of these stresses.
format	article
author	Ismail Boudjemaa A. Sahli A. Benkhettou S. Benbarek
author_facet	Ismail Boudjemaa A. Sahli A. Benkhettou S. Benbarek
author_sort	Ismail Boudjemaa
title	Preliminary results on the effects of orthopedic implant stiffness fixed to the cut end of the femur on the stress at the stump-prosthetic interface
title_short	Preliminary results on the effects of orthopedic implant stiffness fixed to the cut end of the femur on the stress at the stump-prosthetic interface
title_full	Preliminary results on the effects of orthopedic implant stiffness fixed to the cut end of the femur on the stress at the stump-prosthetic interface
title_fullStr	Preliminary results on the effects of orthopedic implant stiffness fixed to the cut end of the femur on the stress at the stump-prosthetic interface
title_full_unstemmed	Preliminary results on the effects of orthopedic implant stiffness fixed to the cut end of the femur on the stress at the stump-prosthetic interface
title_sort	preliminary results on the effects of orthopedic implant stiffness fixed to the cut end of the femur on the stress at the stump-prosthetic interface
publisher	Gruppo Italiano Frattura
publishDate	2021
url	https://doaj.org/article/0c9dce2066534a70a9b8a87bf8b87744
work_keys_str_mv	AT ismailboudjemaa preliminaryresultsontheeffectsoforthopedicimplantstiffnessfixedtothecutendofthefemuronthestressatthestumpprostheticinterface AT asahli preliminaryresultsontheeffectsoforthopedicimplantstiffnessfixedtothecutendofthefemuronthestressatthestumpprostheticinterface AT abenkhettou preliminaryresultsontheeffectsoforthopedicimplantstiffnessfixedtothecutendofthefemuronthestressatthestumpprostheticinterface AT sbenbarek preliminaryresultsontheeffectsoforthopedicimplantstiffnessfixedtothecutendofthefemuronthestressatthestumpprostheticinterface
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Preliminary results on the effects of orthopedic implant stiffness fixed to the cut end of the femur on the stress at the stump-prosthetic interface

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