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Biomechanical Study of the Fixation Strength of Anteromedial Plating for Humeral Shaft Fractures

BACKGROUND: Open reduction and internal fixation with plate and screws are the gold standard for the surgical treatment of humeral shaft fractures, this study was to compare the mechanical properties of anteromedial, anterolateral, and posterior plating for humeral shaft fractures. METHODS: A distal...

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Autores principales: Zheng, Yin-Feng, Zhou, Jun-Lin, Wang, Xiao-Hong, Shan, Lei, Liu, Yang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Medknow Publications & Media Pvt Ltd 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4976575/
https://www.ncbi.nlm.nih.gov/pubmed/27453236
http://dx.doi.org/10.4103/0366-6999.186645
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author Zheng, Yin-Feng
Zhou, Jun-Lin
Wang, Xiao-Hong
Shan, Lei
Liu, Yang
author_facet Zheng, Yin-Feng
Zhou, Jun-Lin
Wang, Xiao-Hong
Shan, Lei
Liu, Yang
author_sort Zheng, Yin-Feng
collection PubMed
description BACKGROUND: Open reduction and internal fixation with plate and screws are the gold standard for the surgical treatment of humeral shaft fractures, this study was to compare the mechanical properties of anteromedial, anterolateral, and posterior plating for humeral shaft fractures. METHODS: A distal third humeral shaft fracture model was constructed using fourth-generation sawbones (#3404, composite bone). A total of 24 sawbones with a distal third humeral shaft fracture was randomly divided into three Groups: A, B, and C (n = 8 in each group) for anteromedial, anterolateral, and posterior plating, respectively. All sawbones were subjected to horizontal torsional fatigue tests, horizontal torsional and axial compressive fatigue tests, four-point bending fatigue tests in anteroposterior (AP) and mediolateral (ML) directions and horizontal torsional destructive tests. RESULTS: In the horizontal torsional fatigue tests, the mean torsional angle amplitude in Groups A, B, and C were 6.12°, 6.53°, and 6.81°. In horizontal torsional and axial compressive fatigue tests, the mean torsional angle amplitude in Groups A, B, and C were 5.66°, 5.67°, and 6.36°. The mean plate displacement amplitude was 0.05 mm, 0.08 mm, and 0.10 mm. Group A was smaller than Group C (P < 0.05). In AP four-point bending fatigue tests, the mean plate displacement amplitude was 0.16 mm, 0.13 mm, and 0.20 mm. Group B was smaller than Group C (P < 0.05). In ML four-point bending fatigue tests, the mean plate displacement amplitude were 0.16 mm, 0.19 mm, and 0.17 mm. In horizontal torsional destructive tests, the mean torsional rigidity in Groups A, B, and C was 0.82, 0.75, and 0.76 N·m/deg. The yielding torsional angle was 24.50°, 25.70°, and 23.86°. The mean yielding torque was 18.46, 18.05, and 16.83 N·m, respectively. CONCLUSIONS: Anteromedial plating was superior to anterolateral or posterior plating in all mechanical tests except in AP four-point bending fatigue tests compared to the anterolateral plating group. We can suggest that anteromedial plating is a clinically safe and effective way for humeral shaft fractures.
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spelling pubmed-49765752016-08-25 Biomechanical Study of the Fixation Strength of Anteromedial Plating for Humeral Shaft Fractures Zheng, Yin-Feng Zhou, Jun-Lin Wang, Xiao-Hong Shan, Lei Liu, Yang Chin Med J (Engl) Original Article BACKGROUND: Open reduction and internal fixation with plate and screws are the gold standard for the surgical treatment of humeral shaft fractures, this study was to compare the mechanical properties of anteromedial, anterolateral, and posterior plating for humeral shaft fractures. METHODS: A distal third humeral shaft fracture model was constructed using fourth-generation sawbones (#3404, composite bone). A total of 24 sawbones with a distal third humeral shaft fracture was randomly divided into three Groups: A, B, and C (n = 8 in each group) for anteromedial, anterolateral, and posterior plating, respectively. All sawbones were subjected to horizontal torsional fatigue tests, horizontal torsional and axial compressive fatigue tests, four-point bending fatigue tests in anteroposterior (AP) and mediolateral (ML) directions and horizontal torsional destructive tests. RESULTS: In the horizontal torsional fatigue tests, the mean torsional angle amplitude in Groups A, B, and C were 6.12°, 6.53°, and 6.81°. In horizontal torsional and axial compressive fatigue tests, the mean torsional angle amplitude in Groups A, B, and C were 5.66°, 5.67°, and 6.36°. The mean plate displacement amplitude was 0.05 mm, 0.08 mm, and 0.10 mm. Group A was smaller than Group C (P < 0.05). In AP four-point bending fatigue tests, the mean plate displacement amplitude was 0.16 mm, 0.13 mm, and 0.20 mm. Group B was smaller than Group C (P < 0.05). In ML four-point bending fatigue tests, the mean plate displacement amplitude were 0.16 mm, 0.19 mm, and 0.17 mm. In horizontal torsional destructive tests, the mean torsional rigidity in Groups A, B, and C was 0.82, 0.75, and 0.76 N·m/deg. The yielding torsional angle was 24.50°, 25.70°, and 23.86°. The mean yielding torque was 18.46, 18.05, and 16.83 N·m, respectively. CONCLUSIONS: Anteromedial plating was superior to anterolateral or posterior plating in all mechanical tests except in AP four-point bending fatigue tests compared to the anterolateral plating group. We can suggest that anteromedial plating is a clinically safe and effective way for humeral shaft fractures. Medknow Publications & Media Pvt Ltd 2016-08-05 /pmc/articles/PMC4976575/ /pubmed/27453236 http://dx.doi.org/10.4103/0366-6999.186645 Text en Copyright: © 2016 Chinese Medical Journal http://creativecommons.org/licenses/by-nc-sa/3.0 This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as the author is credited and the new creations are licensed under the identical terms.
spellingShingle Original Article
Zheng, Yin-Feng
Zhou, Jun-Lin
Wang, Xiao-Hong
Shan, Lei
Liu, Yang
Biomechanical Study of the Fixation Strength of Anteromedial Plating for Humeral Shaft Fractures
title Biomechanical Study of the Fixation Strength of Anteromedial Plating for Humeral Shaft Fractures
title_full Biomechanical Study of the Fixation Strength of Anteromedial Plating for Humeral Shaft Fractures
title_fullStr Biomechanical Study of the Fixation Strength of Anteromedial Plating for Humeral Shaft Fractures
title_full_unstemmed Biomechanical Study of the Fixation Strength of Anteromedial Plating for Humeral Shaft Fractures
title_short Biomechanical Study of the Fixation Strength of Anteromedial Plating for Humeral Shaft Fractures
title_sort biomechanical study of the fixation strength of anteromedial plating for humeral shaft fractures
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4976575/
https://www.ncbi.nlm.nih.gov/pubmed/27453236
http://dx.doi.org/10.4103/0366-6999.186645
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