Please use this identifier to cite or link to this item:
Type: Artigo de periódico
Title: Effects Of Thermocycling And Light Source On The Bond Strength Of Metallic Brackets To Bovine Teeth.
Author: Costa, Ana Rosa
Correr, Américo Bortolazzo
Puppin-Rontani, Regina Maria
Vedovello, Silvia Amélia Scudeler
Valdrighi, Heloísa Cristina
Correr-Sobrinho, Lourenço
Vedovello Filho, Mário
Abstract: This study evaluated the effects of thermocycling and different light sources on the bond strength of metallic brackets to bovine tooth enamel using an adhesive resin. Bovine teeth were etched with 35% phosphoric acid gel for 20 s. After application of primer, metallic brackets were bonded to the buccal surface using Transbond XT, forming 8 groups (n = 20), depending on the light source used for photoactivation (AccuCure 3000 argon laser--20 s, Apollo 95E plasma arc--12 s, UltraLume 5 LED--40 s and XL2500 halogen light--40 s) and experimental conditions without (Groups 1 to 4) or with thermocycling (Groups 5 to 8). Shear bond testing was carried out after 24 h of distilled water storage (Groups 1 to 4) or storage and thermocycling in distilled water (groups 5 to 8; 1,500 cycles--5°/55 °C). Data were subjected to two-way ANOVA and Tukey's test (α = 0.05). The Adhesive Remnant Index (ARI) was evaluated at ×8 magnification. No significant differences (p>0.05) in bond strength were found when the conditions without and with thermocycling were compared for any of the light sources. No significant differences (p>0.05) in bond strength were found among the light sources, irrespective of performing or not thermocycling. There was a predominance of ARI scores 1 in all groups. In conclusion, light sources and thermocycling had no influence on the bond strength of brackets to bovine enamel.
Subject: Acid Etching, Dental
Curing Lights, Dental
Dental Alloys
Dental Bonding
Dental Enamel
Dental Stress Analysis
Materials Testing
Orthodontic Brackets
Phosphoric Acids
Resin Cements
Shear Strength
Stainless Steel
Stress, Mechanical
Surface Properties
Time Factors
Citation: Brazilian Dental Journal. v. 22, n. 6, p. 486-9, 2011.
Rights: fechado
Identifier DOI: 
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File SizeFormat 
pmed_22189644.pdf262.49 kBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.