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Type: Artigo
Title: Effect of hydrofluoric acid concentration and thermal cycling on the bond strength of brackets to ceramic
Author: Aguiar, Ana Paula
Costa, Ana Rosa
Correr, Américo Bortolazzo
Vedovello, Silvia Amélia
Vedovello Filho, Mário
Crepaldi, Marcus Vinicius
Valdrighi, Heloísa Cristina
Correr-Sobrinho, Lourenço
Abstract: This study to evaluate the effects of different hydrofluoric acid (HF) concentrations and thermal cycling on the shear bond strength (SBS) of brackets to ceramic. Cylinders of ceramic were divided into 10 groups (n=15), according to HF concentrations: 1-1%;2- 2.5%;3-5%;4-7.5%;5-10% (storage 24 h); 6-1%;7-2.5%;8-5%;9-7.5%; and, 10-10% (thermal cycling). All cylinders were etched for 60s and received one layer of silane. Metallic brackets were bonded to the cylinders using Transbond-XT, light activated for 40 s, using a LED (Radii Plus) and stored in deionized water at 37o C for 24h. The groups 6 to 10 were submitted to thermal cycling (7,000 cycles – 5o/55oC). SBS was performed in an Instron at crosshead speed of 1.0 mm/min. Data were submitted to two-way ANOVA and Tukey’s post-hoc test (α=0.05). The Adhesive Remaining Index (ARI) was evaluated at 40x magnification. The different HF acid concentrations influenced on the SBS of the brackets to ceramic
Subject: Cerâmica
Materiais dentários
Acido fluoridrico
Country: Brasil
Editor: USP/Fundação Odontológica de Ribeirão Preto
Rights: Aberto
Identifier DOI: 10.1590/0103-6440201902989
Date Issue: 2019
Appears in Collections:FOP - Artigos e Outros Documentos

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