Finite Element Analysis of Transhumeral and Transtibial Percutaneous Osseointegrated Endoprosthesis Implantation

Cadaveric mechanical testing of a percutaneous osseointegration docking system (PODS) for osseointegration (OI) prosthetic limb attachment revealed that translation of the exact system from the humerus to the tibia may not be suitable. The PODS, designed specifically for the humerus achieved 1.4–4.8...

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Autores principales:	Carolyn E. Taylor, Heath B. Henninger, Kent N. Bachus
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	osseointegration finite element endoprosthesis humerus tibia Other systems of medicine RZ201-999 Medical technology R855-855.5
Acceso en línea:	https://doaj.org/article/87efac78ccb54754ae214f45b170c83c
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spelling	oai:doaj.org-article:87efac78ccb54754ae214f45b170c83c2021-11-30T11:48:08ZFinite Element Analysis of Transhumeral and Transtibial Percutaneous Osseointegrated Endoprosthesis Implantation2673-686110.3389/fresc.2021.744674https://doaj.org/article/87efac78ccb54754ae214f45b170c83c2021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fresc.2021.744674/fullhttps://doaj.org/toc/2673-6861Cadaveric mechanical testing of a percutaneous osseointegration docking system (PODS) for osseointegration (OI) prosthetic limb attachment revealed that translation of the exact system from the humerus to the tibia may not be suitable. The PODS, designed specifically for the humerus achieved 1.4–4.8 times greater mechanical stability in the humerus than in the tibia despite morphology that indicated translational feasibility. To better understand this discrepancy, finite element analyses (FEAs) modeled the implantation of the PODS into the bones. Models from cadaveric humeri (n = 3) and tibia (n = 3) were constructed from CT scans, and virtual implantation preparation of an array of endoprosthesis sizes that made contact with the endosteal surface but did not penetrate the outer cortex was performed. Final impaction of the endoprosthesis was simulated using a displacement ramp function to press the endoprosthesis model into the bone. Impaction force and maximum first principal (circumferential) stress were recorded to estimate stability and assess fracture risk of the system. We hypothesized that the humerus and tibia would have different optimal PODS sizing criteria that maximized impaction force and minimized first principal stress. The optimal sizing for the humerus corresponded to implantation instructions, whereas for the tibia optimal sizing was three times larger than the guidelines indicated. This FEA examination of impaction force and stress distribution lead us to believe that the same endoprosthesis strategy for the humerus is not suitable for the tibia because of thin medial and lateral cortices that compromise implantation.Carolyn E. TaylorCarolyn E. TaylorHeath B. HenningerHeath B. HenningerKent N. BachusKent N. BachusKent N. BachusFrontiers Media S.A.articleosseointegrationfinite elementendoprosthesishumerustibiaOther systems of medicineRZ201-999Medical technologyR855-855.5ENFrontiers in Rehabilitation Sciences, Vol 2 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	osseointegration finite element endoprosthesis humerus tibia Other systems of medicine RZ201-999 Medical technology R855-855.5
spellingShingle	osseointegration finite element endoprosthesis humerus tibia Other systems of medicine RZ201-999 Medical technology R855-855.5 Carolyn E. Taylor Carolyn E. Taylor Heath B. Henninger Heath B. Henninger Kent N. Bachus Kent N. Bachus Kent N. Bachus Finite Element Analysis of Transhumeral and Transtibial Percutaneous Osseointegrated Endoprosthesis Implantation
description	Cadaveric mechanical testing of a percutaneous osseointegration docking system (PODS) for osseointegration (OI) prosthetic limb attachment revealed that translation of the exact system from the humerus to the tibia may not be suitable. The PODS, designed specifically for the humerus achieved 1.4–4.8 times greater mechanical stability in the humerus than in the tibia despite morphology that indicated translational feasibility. To better understand this discrepancy, finite element analyses (FEAs) modeled the implantation of the PODS into the bones. Models from cadaveric humeri (n = 3) and tibia (n = 3) were constructed from CT scans, and virtual implantation preparation of an array of endoprosthesis sizes that made contact with the endosteal surface but did not penetrate the outer cortex was performed. Final impaction of the endoprosthesis was simulated using a displacement ramp function to press the endoprosthesis model into the bone. Impaction force and maximum first principal (circumferential) stress were recorded to estimate stability and assess fracture risk of the system. We hypothesized that the humerus and tibia would have different optimal PODS sizing criteria that maximized impaction force and minimized first principal stress. The optimal sizing for the humerus corresponded to implantation instructions, whereas for the tibia optimal sizing was three times larger than the guidelines indicated. This FEA examination of impaction force and stress distribution lead us to believe that the same endoprosthesis strategy for the humerus is not suitable for the tibia because of thin medial and lateral cortices that compromise implantation.
format	article
author	Carolyn E. Taylor Carolyn E. Taylor Heath B. Henninger Heath B. Henninger Kent N. Bachus Kent N. Bachus Kent N. Bachus
author_facet	Carolyn E. Taylor Carolyn E. Taylor Heath B. Henninger Heath B. Henninger Kent N. Bachus Kent N. Bachus Kent N. Bachus
author_sort	Carolyn E. Taylor
title	Finite Element Analysis of Transhumeral and Transtibial Percutaneous Osseointegrated Endoprosthesis Implantation
title_short	Finite Element Analysis of Transhumeral and Transtibial Percutaneous Osseointegrated Endoprosthesis Implantation
title_full	Finite Element Analysis of Transhumeral and Transtibial Percutaneous Osseointegrated Endoprosthesis Implantation
title_fullStr	Finite Element Analysis of Transhumeral and Transtibial Percutaneous Osseointegrated Endoprosthesis Implantation
title_full_unstemmed	Finite Element Analysis of Transhumeral and Transtibial Percutaneous Osseointegrated Endoprosthesis Implantation
title_sort	finite element analysis of transhumeral and transtibial percutaneous osseointegrated endoprosthesis implantation
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/87efac78ccb54754ae214f45b170c83c
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Finite Element Analysis of Transhumeral and Transtibial Percutaneous Osseointegrated Endoprosthesis Implantation

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