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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 fract...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
SAGE Publications
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8637371/ https://www.ncbi.nlm.nih.gov/pubmed/34868723 http://dx.doi.org/10.1177/21514593211055890 |
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author | Rhee, Brian Tommasini, Steven M. Milligan, Kenneth Moulton, Julia Leslie, Michael Wiznia, Daniel H. |
author_facet | Rhee, Brian Tommasini, Steven M. Milligan, Kenneth Moulton, Julia Leslie, Michael Wiznia, Daniel H. |
author_sort | Rhee, Brian |
collection | PubMed |
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 | Online Article Text |
id | pubmed-8637371 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | SAGE Publications |
record_format | MEDLINE/PubMed |
spelling | pubmed-86373712021-12-03 Finite Element Analysis of Cannulated Screws as Prophylactic Intervention of Hip Fractures Rhee, Brian Tommasini, Steven M. Milligan, Kenneth Moulton, Julia Leslie, Michael Wiznia, Daniel H. Geriatr Orthop Surg Rehabil Original Manuscript 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. SAGE Publications 2021-11-24 /pmc/articles/PMC8637371/ /pubmed/34868723 http://dx.doi.org/10.1177/21514593211055890 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by-nc/4.0/This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (https://creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage). |
spellingShingle | Original Manuscript Rhee, Brian Tommasini, Steven M. Milligan, Kenneth Moulton, Julia Leslie, Michael Wiznia, Daniel H. Finite Element Analysis of Cannulated Screws as Prophylactic Intervention of Hip Fractures |
title | 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_short | 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 |
topic | Original Manuscript |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8637371/ https://www.ncbi.nlm.nih.gov/pubmed/34868723 http://dx.doi.org/10.1177/21514593211055890 |
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