Force degradation of different elastomeric chains and nickel titanium closed springs
Aim: The purpose in this study was to evaluate the degradation force of conventional synthetic orthodontic elastics and synthetic orthodontic elastics with memory properties. Methods: Specimens of each material (Plastic chain, Memory chain and Closed spring NiTi) were stretched and adapted to the te...
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doaj-d4825f0463b2421c98327ec32de9ff982021-07-15T14:02:26ZengUniversidade Estadual de CampinasBrazilian Journal of Oral Sciences1677-32252015-11-0110310.20396/bjos.v10i3.8641623Force degradation of different elastomeric chains and nickel titanium closed springsBruno Ubirajara Pires0Rafael Evangelista de Souza1Mario Vedovello Filho2Viviane Veroni Degan3Julio Cesar Bento dos Santos4Carlos Alberto Malanconi Tubel5Fundação Hermínio Ometto-UNIARARASFundação Hermínio Ometto-UNIARARASFundação Hermínio Ometto-UNIARARASFundação Hermínio Ometto-UNIARARASFundação Hermínio Ometto-UNIARARASFundação Hermínio Ometto-UNIARARASAim: The purpose in this study was to evaluate the degradation force of conventional synthetic orthodontic elastics and synthetic orthodontic elastics with memory properties. Methods: Specimens of each material (Plastic chain, Memory chain and Closed spring NiTi) were stretched and adapted to the test specimens composed of resin plates and orthodontic wires, simulating retraction units. Degradation force was verified in an Instron universal test machine at the following intervals: 1, 2, 18, 24, 48 h; 7, 14, 21, and 28 days. Data (gF) were analyzed statistically using Friedman and Kruskal-Wallis tests at 5% significance level. Results: It was observed a significant force reduction of Plastic chain and Memory chain after 2 h (p<0.05). For NiTi spring significantly force reduction was observed after 18 h, but no significant change was showed up to 21 days. NiTi spring showed force significantly higher than synthetic elastomeric materials (p<0.05). There was no significant difference between Memory chain and Plastic chain up to 24 h. However, from 48 h to 21 days Memory chain showed force significantly higher than Plastic chain. Conclusions: There was higher force degradation in the synthetic elastomeric materials in comparison with NiTi springs, which allows the preferential indication of these space closure jigs for clinical use.https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641623OrthodonticsBiomechanicsTensile strengthElastomeric chainsClosed nickel titanium |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Bruno Ubirajara Pires Rafael Evangelista de Souza Mario Vedovello Filho Viviane Veroni Degan Julio Cesar Bento dos Santos Carlos Alberto Malanconi Tubel |
spellingShingle |
Bruno Ubirajara Pires Rafael Evangelista de Souza Mario Vedovello Filho Viviane Veroni Degan Julio Cesar Bento dos Santos Carlos Alberto Malanconi Tubel Force degradation of different elastomeric chains and nickel titanium closed springs Brazilian Journal of Oral Sciences Orthodontics Biomechanics Tensile strength Elastomeric chains Closed nickel titanium |
author_facet |
Bruno Ubirajara Pires Rafael Evangelista de Souza Mario Vedovello Filho Viviane Veroni Degan Julio Cesar Bento dos Santos Carlos Alberto Malanconi Tubel |
author_sort |
Bruno Ubirajara Pires |
title |
Force degradation of different elastomeric chains and nickel titanium closed springs |
title_short |
Force degradation of different elastomeric chains and nickel titanium closed springs |
title_full |
Force degradation of different elastomeric chains and nickel titanium closed springs |
title_fullStr |
Force degradation of different elastomeric chains and nickel titanium closed springs |
title_full_unstemmed |
Force degradation of different elastomeric chains and nickel titanium closed springs |
title_sort |
force degradation of different elastomeric chains and nickel titanium closed springs |
publisher |
Universidade Estadual de Campinas |
series |
Brazilian Journal of Oral Sciences |
issn |
1677-3225 |
publishDate |
2015-11-01 |
description |
Aim: The purpose in this study was to evaluate the degradation force of conventional synthetic orthodontic elastics and synthetic orthodontic elastics with memory properties. Methods: Specimens of each material (Plastic chain, Memory chain and Closed spring NiTi) were stretched and adapted to the test specimens composed of resin plates and orthodontic wires, simulating retraction units. Degradation force was verified in an Instron universal test machine at the following intervals: 1, 2, 18, 24, 48 h; 7, 14, 21, and 28 days. Data (gF) were analyzed statistically using Friedman and Kruskal-Wallis tests at 5% significance level. Results: It was observed a significant force reduction of Plastic chain and Memory chain after 2 h (p<0.05). For NiTi spring significantly force reduction was observed after 18 h, but no significant change was showed up to 21 days. NiTi spring showed force significantly higher than synthetic elastomeric materials (p<0.05). There was no significant difference between Memory chain and Plastic chain up to 24 h. However, from 48 h to 21 days Memory chain showed force significantly higher than Plastic chain. Conclusions: There was higher force degradation in the synthetic elastomeric materials in comparison with NiTi springs, which allows the preferential indication of these space closure jigs for clinical use. |
topic |
Orthodontics Biomechanics Tensile strength Elastomeric chains Closed nickel titanium |
url |
https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641623 |
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