Deformation of nickel-titanium closed coil springs: an in vitro study
ABSTRACT Objective: The aim of this paper was to determine the amount of deformation in four commercial brands of nickel-titanium closed springs. Methods: A total of 130 springs were divided into 13 subgroups, according to their features and manufacturers (Morelli, Orthometric, Ormco and GAC) and activated from 100% to 1000% of the effective length of the nickel-titanium portion present at the spring, at 37 °C. Deactivation data were plotted and deformation was found graphically. The values were compared by analysis of variance and Tukey's post-hoc test. Results: Springs manufactured by Morelli had the same amount of deformation when they were activated up to 700% of Y activation; springs by Orthometric had the same amount of deformation up to 600-700% of Y; springs by Ormco had the same amount of deformation up to 700-800% of Y; and finally, the majority of springs by GAC had similar deformation up to 800%-1000% of activation. All springs tested could be activated up to 700% without rupture. Conclusions: Most subgroups were similarly deformed up to 700% of activation, without rupture of springs. Subgroups 4B, 4C, 4D and 4E showed the same amount of deformation up to 1000% of activation without any rupture at all.
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Dental Press International
2017
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oai:scielo:S2176-945120170001000382017-04-12Deformation of nickel-titanium closed coil springs: an in vitro studyVieira,Camilla Ivini VianaReis,José Maurício dos Santos NunesVaz,Luiz GeraldoMartins,Lídia ParsekianMartins,Renato Parsekian NiTi Deformation Biomechanics. ABSTRACT Objective: The aim of this paper was to determine the amount of deformation in four commercial brands of nickel-titanium closed springs. Methods: A total of 130 springs were divided into 13 subgroups, according to their features and manufacturers (Morelli, Orthometric, Ormco and GAC) and activated from 100% to 1000% of the effective length of the nickel-titanium portion present at the spring, at 37 °C. Deactivation data were plotted and deformation was found graphically. The values were compared by analysis of variance and Tukey's post-hoc test. Results: Springs manufactured by Morelli had the same amount of deformation when they were activated up to 700% of Y activation; springs by Orthometric had the same amount of deformation up to 600-700% of Y; springs by Ormco had the same amount of deformation up to 700-800% of Y; and finally, the majority of springs by GAC had similar deformation up to 800%-1000% of activation. All springs tested could be activated up to 700% without rupture. Conclusions: Most subgroups were similarly deformed up to 700% of activation, without rupture of springs. Subgroups 4B, 4C, 4D and 4E showed the same amount of deformation up to 1000% of activation without any rupture at all.info:eu-repo/semantics/openAccessDental Press InternationalDental Press Journal of Orthodontics v.22 n.1 20172017-02-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512017000100038en10.1590/2177-6709.22.1.038-046.oar |
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Vieira,Camilla Ivini Viana Reis,José Maurício dos Santos Nunes Vaz,Luiz Geraldo Martins,Lídia Parsekian Martins,Renato Parsekian |
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Vieira,Camilla Ivini Viana Reis,José Maurício dos Santos Nunes Vaz,Luiz Geraldo Martins,Lídia Parsekian Martins,Renato Parsekian Deformation of nickel-titanium closed coil springs: an in vitro study |
author_facet |
Vieira,Camilla Ivini Viana Reis,José Maurício dos Santos Nunes Vaz,Luiz Geraldo Martins,Lídia Parsekian Martins,Renato Parsekian |
author_sort |
Vieira,Camilla Ivini Viana |
title |
Deformation of nickel-titanium closed coil springs: an in vitro study |
title_short |
Deformation of nickel-titanium closed coil springs: an in vitro study |
title_full |
Deformation of nickel-titanium closed coil springs: an in vitro study |
title_fullStr |
Deformation of nickel-titanium closed coil springs: an in vitro study |
title_full_unstemmed |
Deformation of nickel-titanium closed coil springs: an in vitro study |
title_sort |
deformation of nickel-titanium closed coil springs: an in vitro study |
description |
ABSTRACT Objective: The aim of this paper was to determine the amount of deformation in four commercial brands of nickel-titanium closed springs. Methods: A total of 130 springs were divided into 13 subgroups, according to their features and manufacturers (Morelli, Orthometric, Ormco and GAC) and activated from 100% to 1000% of the effective length of the nickel-titanium portion present at the spring, at 37 °C. Deactivation data were plotted and deformation was found graphically. The values were compared by analysis of variance and Tukey's post-hoc test. Results: Springs manufactured by Morelli had the same amount of deformation when they were activated up to 700% of Y activation; springs by Orthometric had the same amount of deformation up to 600-700% of Y; springs by Ormco had the same amount of deformation up to 700-800% of Y; and finally, the majority of springs by GAC had similar deformation up to 800%-1000% of activation. All springs tested could be activated up to 700% without rupture. Conclusions: Most subgroups were similarly deformed up to 700% of activation, without rupture of springs. Subgroups 4B, 4C, 4D and 4E showed the same amount of deformation up to 1000% of activation without any rupture at all. |
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Dental Press International |
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2017 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512017000100038 |
work_keys_str_mv |
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