Comparison of deflection forces of esthetic wires combined with esthetic brackets

• Autor(a) principal: Matias, Murilo
• Data de Publicação: 2015
• Tipo de documento: Dissertação
• Idioma: eng
• Título da fonte: Biblioteca Digital de Teses e Dissertações da USP
• Texto Completo: https://www.teses.usp.br/teses/disponiveis/25/25144/tde-15122021-113453/
• topic: Bending; Braquetes ortodônticos; Coating; Deflexão; Estética; Esthetics; Fios ortodônticos; Orthodontic brackets; Orthodontic wires

Coated wires and ceramic brackets have been developed to improve esthetics during orthodontic treatment. The aim was to compare the deflection force in coated nickeltitanium (NiTi) and esthetic wires in esthetic brackets. Four coated NiTi wires (Reflex Nickel Titanium and Aesthetic NiTi, by TP Orthodontics; Flexy NiTi, by Orthometric and Spectra, by GAC), one esthetic wire (Optis, by TP Orthodontics) and three different esthetics brackets (Inspire Ice, by Ormco; Mystique, by GAC and Clarity, by 3M/Unitek) were used. The specimens were set up on a clinical simulation device and evaluated in a Universal Testing Machine (Instron). In an acrylic resin plate, similar to parable form, 10 devices were fixed, in which the brackets were bonded. Three of these models were prepared for attach each set of attachment tested. Acrylic device representative of the right maxillary central incisor was activated on the bucco-lingual movement with record from 0.5 mm to 3 mm. Speed of the testing machine to the deflection was 2 mm/min. ANOVA and Tukey tests were used at P<0.05 to compare different wires and brackets.The lowest forces were generated by Spectra wire with Clarity bracket. The highest forces were generated by Flexy NiTi wire with Inspire Ice bracket. In the deflection of 3 mm, Optis wire experienced cracking and produced an extremely low force in 2; 1 and 0.5 mm unloading. Esthetic brackets and wires, when used together, can exhibit very different patterns of forces due to bracket composition and type of wire coating.