Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/108559
Type: Artigo de periódico
Title: Effect Of Etching Time And Light Source On The Bond Strength Of Metallic Brackets To Ceramic
Author: Goncalves P.R.A.
de Moraes R.R.
Costa A.R.
Correr A.B.
Nouer P.R.A.
Sinhoreti M.A.C.
Correr-Sobrinho L.
Abstract: This study evaluated the bond strength of brackets to ceramic testing different etching times and light sources for photo-activation of the bonding agent. Cylinders of feldspathic ceramic were etched with 10% hydrofluoric acid for 20 or 60 s. After application of silane on the ceramic surface, metallic brackets were bonded to the cylinders using Transbond XT (3M Unitek). The specimens for each etching time were assigned to 4 groups (n=15), according to the light source: XL2500 halogen light, UltraLume 5 LED, AccuCure 3000 argon laser, and Apollo 95E plasma arc. Light-activation was carried out with total exposure times of 40, 40, 20 and 12 s, respectively. Shear strength testing was carried out after 24 h. The adhesive remnant index (ARI) was evaluated under magnification. Data were subjected to two-way ANOVA and Tukey's test (α=0.05). Specimens etched for 20 s presented significantly lower bond strength (p<0.05) compared with those etched for 60 s. No significant differences (p>0.05) were detected among the light sources. The ARI showed a predominance of scores 0 in all groups, with an increase in scores 1, 2 and 3 for the 60 s time. In conclusion, only the etching time had significant influence on the bond strength of brackets to ceramic.
Editor: 
Rights: aberto
Identifier DOI: 10.1590/S0103-64402011000300011
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-79959845787&partnerID=40&md5=d3fd70230143ecae47a837d313c6795c
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

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