Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/198724
Type: Artigo de periódico
Title: Bond Strength Of Dental Adhesive Systems Irradiated With Ionizing Radiation.
Author: Dibo da Cruz, Adriana
Goncalves, Luciano de Souza
Rastelli, Alessandra Nara de Souza
Correr-Sobrinho, Lorenco
Bagnato, Vanderlei Salvador
Boscolo, Frab Norberto
Abstract: The aim of the present paper was to determine the effect of different types of ionizing radiation on the bond strength of three different dentin adhesive systems. One hundred twenty specimens of 60 human teeth (protocol number: 032/2007) sectioned mesiodistally were divided into 3 groups according to the adhesives systems used: SB (Adper Single Bond Plus), CB (Clearfil SE Bond) and AP (Adper Prompt Self-Etch). The adhesives were applied on dentin and photo-activated using LED (Lec 1000, MMoptics, 1000 mW/cm2). Customized elastomer molds (0.5 mm thickness) with three orifices of 1.2 mm diameter were placed onto the bonding areas and filled with composite resin (Filtek Z-250), which was photo-activated for 20 s. Each group was subdivided into 4 subgroups for application of the different types of ionizing radiation: ultraviolet radiation (UV), diagnostic x-ray radiation (DX), therapeutic x-ray radiation (TX) and without irradiation (control group, CG). Microshear tests were carried out (Instron, model 4411), and afterwards the modes of failure were evaluated by optical and scanning electron microscope and classified using 5 scores: adhesive failure, mixed failures with 3 significance levels, and cohesive failure. The results of the shear bond strength test were submitted to ANOVA with Tukey's test and Dunnett's test, and the data from the failure pattern evaluation were analyzed with the Mann Whitney test (p = 0.05). No change in bond strength of CB and AP was observed after application of the different radiation types, only SB showed increase in bond strength after UV (p = 0.0267) irradiation. The UV also changed the failure patterns of SB (p = 0.0001). The radio-induced changes did not cause degradation of the restorations, which means that they can be exposed to these types of ionizing radiation without weakening the bond strength.
Subject: Analysis Of Variance
Bisphenol A-glycidyl Methacrylate
Dental Bonding
Dental Stress Analysis
Dentin-bonding Agents
Humans
Light-curing Of Dental Adhesives
Materials Testing
Organophosphates
Resin Cements
Shear Strength
Statistics, Nonparametric
Ultraviolet Rays
X-rays
Rights: aberto
Identifier DOI: 10.3290/j.jad.a17530
Address: http://www.ncbi.nlm.nih.gov/pubmed/20157673
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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