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Effect of different orientations of screw fixation for radial head fractures: a biomechanical comparison

BACKGROUND: Screw fixation is a common method used for the treatment of Mason type II radial head fractures. The purpose of our study was to evaluate the mechanical properties of three different screw orientations used for fixation of Mason type II radial head fractures. METHODS: We sawed 24 medium-...

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Autores principales: Shi, Xuchao, Pan, Tianlong, Wu, Dengying, Cai, Ningyu, Chen, Rong, Li, Bin, Zhang, Rui, Zhou, Chengwei, Pan, Jun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5625609/
https://www.ncbi.nlm.nih.gov/pubmed/28969668
http://dx.doi.org/10.1186/s13018-017-0641-9
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author Shi, Xuchao
Pan, Tianlong
Wu, Dengying
Cai, Ningyu
Chen, Rong
Li, Bin
Zhang, Rui
Zhou, Chengwei
Pan, Jun
author_facet Shi, Xuchao
Pan, Tianlong
Wu, Dengying
Cai, Ningyu
Chen, Rong
Li, Bin
Zhang, Rui
Zhou, Chengwei
Pan, Jun
author_sort Shi, Xuchao
collection PubMed
description BACKGROUND: Screw fixation is a common method used for the treatment of Mason type II radial head fractures. The purpose of our study was to evaluate the mechanical properties of three different screw orientations used for fixation of Mason type II radial head fractures. METHODS: We sawed 24 medium-frequency fourth-generation Synbone radial bones to simulate unstable radial head fractures, which we then fixed with three different screw orientations. Implants were tested under axial load by the tension-torsion composite test system. If the implant-radial constructs did not fail after the axial load test, an axial failure load was added to the remaining constructs. RESULTS: The stiffness of the divergent group was the highest of the three orientations, and this group had statistically significant difference from the other two groups (p < 0.05). However, there was no statistically significant difference between the convergence group and the parallel group (p > 0.05). When the displacement reached 2 mm, the load of the divergent screw was still larger than the other two groups (p < 0.05). CONCLUSIONS: The divergent screw orientation was the most stable and had the greatest control of Mason type II fractures of these three groups. Therefore, it can be better applied in clinical settings.
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spelling pubmed-56256092017-10-12 Effect of different orientations of screw fixation for radial head fractures: a biomechanical comparison Shi, Xuchao Pan, Tianlong Wu, Dengying Cai, Ningyu Chen, Rong Li, Bin Zhang, Rui Zhou, Chengwei Pan, Jun J Orthop Surg Res Research Article BACKGROUND: Screw fixation is a common method used for the treatment of Mason type II radial head fractures. The purpose of our study was to evaluate the mechanical properties of three different screw orientations used for fixation of Mason type II radial head fractures. METHODS: We sawed 24 medium-frequency fourth-generation Synbone radial bones to simulate unstable radial head fractures, which we then fixed with three different screw orientations. Implants were tested under axial load by the tension-torsion composite test system. If the implant-radial constructs did not fail after the axial load test, an axial failure load was added to the remaining constructs. RESULTS: The stiffness of the divergent group was the highest of the three orientations, and this group had statistically significant difference from the other two groups (p < 0.05). However, there was no statistically significant difference between the convergence group and the parallel group (p > 0.05). When the displacement reached 2 mm, the load of the divergent screw was still larger than the other two groups (p < 0.05). CONCLUSIONS: The divergent screw orientation was the most stable and had the greatest control of Mason type II fractures of these three groups. Therefore, it can be better applied in clinical settings. BioMed Central 2017-10-02 /pmc/articles/PMC5625609/ /pubmed/28969668 http://dx.doi.org/10.1186/s13018-017-0641-9 Text en © The Author(s). 2017 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
spellingShingle Research Article
Shi, Xuchao
Pan, Tianlong
Wu, Dengying
Cai, Ningyu
Chen, Rong
Li, Bin
Zhang, Rui
Zhou, Chengwei
Pan, Jun
Effect of different orientations of screw fixation for radial head fractures: a biomechanical comparison
title Effect of different orientations of screw fixation for radial head fractures: a biomechanical comparison
title_full Effect of different orientations of screw fixation for radial head fractures: a biomechanical comparison
title_fullStr Effect of different orientations of screw fixation for radial head fractures: a biomechanical comparison
title_full_unstemmed Effect of different orientations of screw fixation for radial head fractures: a biomechanical comparison
title_short Effect of different orientations of screw fixation for radial head fractures: a biomechanical comparison
title_sort effect of different orientations of screw fixation for radial head fractures: a biomechanical comparison
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5625609/
https://www.ncbi.nlm.nih.gov/pubmed/28969668
http://dx.doi.org/10.1186/s13018-017-0641-9
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