Deflection test evaluation of different lots of the same nickel-titanium wire commercial brand

Neves, Murilo Gaby; Lima, Fabrício Viana Pereira; Gurgel, Júlio de Araújo; Pinzan-Vercelino, Célia Regina Maio; Rezende, Fernanda Soares; Brandão, Gustavo Antônio Martins

doi:10.1590/2177-6709.21.1.042-046.oar

Cited by 3 publications

(1 citation statement)

References 14 publications

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“…These findings were similar to the previous studies. [1617] Some studies have reported that the co-axial wires are viable alternative to the Titanium alloy,[181920] but in this study, the activation and deactivation forces of co-axial wires were incomparable at any point of deflection.…”

Section: Discussionmentioning

confidence: 67%

Forces in initial archwires during leveling and aligning: An in-vitro study

Reddy¹,

Katari²,

Bypureddy³

et al. 2016

J Int Soc Prevent Communit Dent

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Aim:This in-vitro study measured the force deflection behavior of selected initial alignment archwires by conducting three-point bending tests under controlled tests. The study tested three wire designs, namely, co-axial multistranded stainless steel wires, nickel–titanium, and copper–nickel–titanium archwires.Materials and Methods:The archwires were ligated to a specially designed metal jig, simulating the arch. A testing machine (Instron) recorded activation and deactivation forces of different deflections at 37°C. Forces on activation and deactivation were compared by one-way analysis of variance (ANOVA).Results:Significant differences (P < 0.05) in activation and deactivation forces were observed among the tested wires. The co-axial multistranded wire had the lowest mean activation and deactivation forces, whereas conventional nickel–titanium wires had more mean activation and deactivation forces at different deflections.Conclusion:The activation and deactivation forces were higher for nickel–titanium followed by copper–nickel titanium and co-axial wires. The amount of percentage force loss was more for co-axial wire, indicating that these wires are not ideal for initial leveling and aligning.

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