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The effect of perturbations on resistance to sliding in second-order moments comparing two different bracket types

Orthodontic literature has shown all ligation methods to behave similarly in the clinical situation; however, the reasoning behind this still requires further investigation. A novel frictional device able to measure forces at the level of the bracket along with a custom perturbation device was used...

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Autores principales: Wong, Justin K, Romanyk, Dan L, Toogood, Roger W, Heo, Giseon, Carey, Jason P, Major, Paul W
Formato: Online Artículo Texto
Lenguaje:English
Publicado: SAGE Publications 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4228925/
https://www.ncbi.nlm.nih.gov/pubmed/25395993
http://dx.doi.org/10.1177/1758736014557500
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author Wong, Justin K
Romanyk, Dan L
Toogood, Roger W
Heo, Giseon
Carey, Jason P
Major, Paul W
author_facet Wong, Justin K
Romanyk, Dan L
Toogood, Roger W
Heo, Giseon
Carey, Jason P
Major, Paul W
author_sort Wong, Justin K
collection PubMed
description Orthodontic literature has shown all ligation methods to behave similarly in the clinical situation; however, the reasoning behind this still requires further investigation. A novel frictional device able to measure forces at the level of the bracket along with a custom perturbation device was used to investigate the effect of perturbations on resistance to sliding (RS) using conventional and passive ligated brackets. 150 3M Victory Series twins (0.022 slot) and 150 Damon Q brackets (0.022 slot) were tested using an 0.018 x 0.025 stainless steel wire for RS. There were 5 test groups consisting of equal numbers (n=30) representing combinations of high and low amplitude and frequency of perturbations along with a control. Second order angulation tested ranged from 0 to 6 degrees. Results for conventional brackets in the presence of perturbations at 0 degrees showed there was a statistically significant reduction (P<0.001) in RS when compared to controls. At 6 degrees, this difference (P<0.001) was seen in both high perturbation groups and one of the low perturbation groups. For passive ligated brackets, no statistically significant difference between groups was seen at 0 degrees. However, at 6 degrees high perturbation groups both resulted in statistically significant (P<0.001) reductions in RS when compared to controls. From this study it was concluded that passive ligated brackets have a lower RS when compared to conventional ligated brackets under all test conditions and angulations. Also, amplitude of perturbations has a larger role than frequency in reduction of RS values.
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spelling pubmed-42289252014-11-13 The effect of perturbations on resistance to sliding in second-order moments comparing two different bracket types Wong, Justin K Romanyk, Dan L Toogood, Roger W Heo, Giseon Carey, Jason P Major, Paul W J Dent Biomech Original Article Orthodontic literature has shown all ligation methods to behave similarly in the clinical situation; however, the reasoning behind this still requires further investigation. A novel frictional device able to measure forces at the level of the bracket along with a custom perturbation device was used to investigate the effect of perturbations on resistance to sliding (RS) using conventional and passive ligated brackets. 150 3M Victory Series twins (0.022 slot) and 150 Damon Q brackets (0.022 slot) were tested using an 0.018 x 0.025 stainless steel wire for RS. There were 5 test groups consisting of equal numbers (n=30) representing combinations of high and low amplitude and frequency of perturbations along with a control. Second order angulation tested ranged from 0 to 6 degrees. Results for conventional brackets in the presence of perturbations at 0 degrees showed there was a statistically significant reduction (P<0.001) in RS when compared to controls. At 6 degrees, this difference (P<0.001) was seen in both high perturbation groups and one of the low perturbation groups. For passive ligated brackets, no statistically significant difference between groups was seen at 0 degrees. However, at 6 degrees high perturbation groups both resulted in statistically significant (P<0.001) reductions in RS when compared to controls. From this study it was concluded that passive ligated brackets have a lower RS when compared to conventional ligated brackets under all test conditions and angulations. Also, amplitude of perturbations has a larger role than frequency in reduction of RS values. SAGE Publications 2014-11-04 /pmc/articles/PMC4228925/ /pubmed/25395993 http://dx.doi.org/10.1177/1758736014557500 Text en © The Author(s) 2014 http://creativecommons.org/licenses/by-nc/3.0/ This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 3.0 License (http://www.creativecommons.org/licenses/by-nc/3.0/) 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 page (http://www.uk.sagepub.com/aboutus/openaccess.htm).
spellingShingle Original Article
Wong, Justin K
Romanyk, Dan L
Toogood, Roger W
Heo, Giseon
Carey, Jason P
Major, Paul W
The effect of perturbations on resistance to sliding in second-order moments comparing two different bracket types
title The effect of perturbations on resistance to sliding in second-order moments comparing two different bracket types
title_full The effect of perturbations on resistance to sliding in second-order moments comparing two different bracket types
title_fullStr The effect of perturbations on resistance to sliding in second-order moments comparing two different bracket types
title_full_unstemmed The effect of perturbations on resistance to sliding in second-order moments comparing two different bracket types
title_short The effect of perturbations on resistance to sliding in second-order moments comparing two different bracket types
title_sort effect of perturbations on resistance to sliding in second-order moments comparing two different bracket types
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4228925/
https://www.ncbi.nlm.nih.gov/pubmed/25395993
http://dx.doi.org/10.1177/1758736014557500
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