Force degradation of different elastomeric chains and nickel titanium closed springs

Authors

  • Bruno Ubirajara Pires Fundação Hermínio Ometto-UNIARARAS
  • Rafael Evangelista de Souza Fundação Hermínio Ometto-UNIARARAS
  • Mario Vedovello Filho Fundação Hermínio Ometto-UNIARARAS
  • Viviane Veroni Degan Fundação Hermínio Ometto-UNIARARAS
  • Julio Cesar Bento dos Santos Fundação Hermínio Ometto-UNIARARAS
  • Carlos Alberto Malanconi Tubel Fundação Hermínio Ometto-UNIARARAS

DOI:

https://doi.org/10.20396/bjos.v10i3.8641623

Keywords:

Orthodontics, Biomechanics, Tensile strength, Elastomeric chains, Closed nickel titanium

Abstract

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.

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Author Biographies

Bruno Ubirajara Pires, Fundação Hermínio Ometto-UNIARARAS

DDS, Graduate Student in Orthodontics, Fundação Hermínio Ometto-UNIARARAS, Araras

Rafael Evangelista de Souza, Fundação Hermínio Ometto-UNIARARAS

Undergraduate Student Dentistry, Fundação Hermínio Ometto-UNIARARAS, Araras

Mario Vedovello Filho, Fundação Hermínio Ometto-UNIARARAS

PhD, Professor of the Graduate program in Orthodontics, Fundação Hermínio Ometto-UNIARARAS, Araras, SP

Viviane Veroni Degan, Fundação Hermínio Ometto-UNIARARAS

PhD, Professor of the Graduate program in Orthodontics, Fundação Hermínio Ometto-UNIARARAS, Araras, SP

Julio Cesar Bento dos Santos, Fundação Hermínio Ometto-UNIARARAS

PhD, Professor of the Graduate program in Orthodontics, Fundação Hermínio Ometto-UNIARARAS, Araras, SP

Carlos Alberto Malanconi Tubel, Fundação Hermínio Ometto-UNIARARAS

PhD, Professor of the Graduate program in Orthodontics, Fundação Hermínio Ometto-UNIARARAS, Araras, SP

Published

2015-11-09

How to Cite

1.
Pires BU, Souza RE de, Vedovello Filho M, Degan VV, Santos JCB dos, Tubel CAM. Force degradation of different elastomeric chains and nickel titanium closed springs. Braz. J. Oral Sci. [Internet]. 2015 Nov. 9 [cited 2022 Dec. 9];10(3):167-70. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641623

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