Finite Element Analysis of Cannulated Screws as Prophylactic Intervention of Hip Fractures

Introduction The frequency of hip fractures, a major cause of morbidity and mortality for geriatric patients, is expected to increase exponentially in the next few decades. The aim of this study is to assess the ability of stainless-steel cannulated screws to reduce the risk of a femoral neck fractu...

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Autores principales: Brian Rhee, Steven M. Tommasini PhD, Kenneth Milligan MD, Julia Moulton, Michael Leslie DO, FAOA, Daniel H. Wiznia MD
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Lenguaje:EN
Publicado: SAGE Publishing 2021
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Acceso en línea:https://doaj.org/article/3061af3b2aed4916b0359ac2a243ecf2
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spelling oai:doaj.org-article:3061af3b2aed4916b0359ac2a243ecf22021-12-01T02:03:25ZFinite Element Analysis of Cannulated Screws as Prophylactic Intervention of Hip Fractures2151-459310.1177/21514593211055890https://doaj.org/article/3061af3b2aed4916b0359ac2a243ecf22021-11-01T00:00:00Zhttps://doi.org/10.1177/21514593211055890https://doaj.org/toc/2151-4593Introduction The frequency of hip fractures, a major cause of morbidity and mortality for geriatric patients, is expected to increase exponentially in the next few decades. The aim of this study is to assess the ability of stainless-steel cannulated screws to reduce the risk of a femoral neck fracture, if placed prophylactically prior to a fall. Materials and Methods We created finite element models from computed tomography (CT) scan-based 3D models of a geriatric patient through 3D-image processing and model generation software. We used linear finite element simulations to analyze the effect of cannulated screws in the proximal femur in single-leg stance and lateral fall, which were processed for peak von Mises stresses and element failure. Findings Prophylactically placed cannulated screws significantly reduced failure in an osteoporotic proximal femur undergoing lateral fall. Three implanted screws in an inverted triangle formation decreased proximal femoral trabecular failure by 21% and cortical failure by 5%. This reduction in failure was achieved with a 55% decrease in femoral neck failure and 14% in lateral cortex failure. Conclusion Our results indicate that cannulated hip screws in an inverted triangle formation may strengthen an osteoporotic proximal femur in the event of a lateral fall. Mechanical testing on cadaveric or composite models is required to validate these results.Brian RheeSteven M. Tommasini PhDKenneth Milligan MDJulia MoultonMichael Leslie DO, FAOADaniel H. Wiznia MDSAGE PublishingarticleOrthopedic surgeryRD701-811GeriatricsRC952-954.6ENGeriatric Orthopaedic Surgery & Rehabilitation, Vol 12 (2021)
institution DOAJ
collection DOAJ
language EN
topic Orthopedic surgery
RD701-811
Geriatrics
RC952-954.6
spellingShingle Orthopedic surgery
RD701-811
Geriatrics
RC952-954.6
Brian Rhee
Steven M. Tommasini PhD
Kenneth Milligan MD
Julia Moulton
Michael Leslie DO, FAOA
Daniel H. Wiznia MD
Finite Element Analysis of Cannulated Screws as Prophylactic Intervention of Hip Fractures
description Introduction The frequency of hip fractures, a major cause of morbidity and mortality for geriatric patients, is expected to increase exponentially in the next few decades. The aim of this study is to assess the ability of stainless-steel cannulated screws to reduce the risk of a femoral neck fracture, if placed prophylactically prior to a fall. Materials and Methods We created finite element models from computed tomography (CT) scan-based 3D models of a geriatric patient through 3D-image processing and model generation software. We used linear finite element simulations to analyze the effect of cannulated screws in the proximal femur in single-leg stance and lateral fall, which were processed for peak von Mises stresses and element failure. Findings Prophylactically placed cannulated screws significantly reduced failure in an osteoporotic proximal femur undergoing lateral fall. Three implanted screws in an inverted triangle formation decreased proximal femoral trabecular failure by 21% and cortical failure by 5%. This reduction in failure was achieved with a 55% decrease in femoral neck failure and 14% in lateral cortex failure. Conclusion Our results indicate that cannulated hip screws in an inverted triangle formation may strengthen an osteoporotic proximal femur in the event of a lateral fall. Mechanical testing on cadaveric or composite models is required to validate these results.
format article
author Brian Rhee
Steven M. Tommasini PhD
Kenneth Milligan MD
Julia Moulton
Michael Leslie DO, FAOA
Daniel H. Wiznia MD
author_facet Brian Rhee
Steven M. Tommasini PhD
Kenneth Milligan MD
Julia Moulton
Michael Leslie DO, FAOA
Daniel H. Wiznia MD
author_sort Brian Rhee
title Finite Element Analysis of Cannulated Screws as Prophylactic Intervention of Hip Fractures
title_short Finite Element Analysis of Cannulated Screws as Prophylactic Intervention of Hip Fractures
title_full Finite Element Analysis of Cannulated Screws as Prophylactic Intervention of Hip Fractures
title_fullStr Finite Element Analysis of Cannulated Screws as Prophylactic Intervention of Hip Fractures
title_full_unstemmed Finite Element Analysis of Cannulated Screws as Prophylactic Intervention of Hip Fractures
title_sort finite element analysis of cannulated screws as prophylactic intervention of hip fractures
publisher SAGE Publishing
publishDate 2021
url https://doaj.org/article/3061af3b2aed4916b0359ac2a243ecf2
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