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ORIGINAL ARTICLE
Year : 2019  |  Volume : 9  |  Issue : 1  |  Page : 19-24

Force magnitude of nickel-titanium orthodontic wires


1 Department of Orthodontics, Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Bauru, São Paulo, Brazil
2 Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, São Paulo, Brazil
3 Department of Mechanical Engineering, College of Engineering – Universidade Estadual Paulista, Bauru, São Paulo, Brazil
4 Department of Stomatology and Oral Biology, Bauru Dental School, University of São Paulo, Bauru, São Paulo, Brazil
5 Department of Orthodontics, University of North Parana, Londrina, Paraná, Brazil
6 Department of Orthodontics, Bauru Dental School, Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Bauru, São Paulo, Brazil

Correspondence Address:
Renata Sathler
Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Bauru, São Paulo
Brazil
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/jid.jid_14_18

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Objective: The purpose of this study is to evaluate the magnitude of forces released by nickel-titanium (NiTi) orthodontic wires used for leveling and alignment. Materials and Methods: Eleven groups of 0.014” NiTi orthodontic wires of six different brands were tested. A 3342 Instron universal testing machine with a 10 N load cell was used and the ISO 15.841 was followed. Kolmogorov–Smirnov tests were used to verify normality and ANOVA followed by Tukey's tests were used for intergroup comparisons. Results: Abzil conventional, GAC conventional, Morelli heat-activated (HA), Ormco CuNiTi, and Orthometric conventional released load within the optimum range of 50–100 cN. HA wires released lower forces compared to conventional wire of the same brand. Conclusions: Heat-activated Morelli and CuNiTi Ormco presented homogeneous loads within an optimal range.


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