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Type: Artigo de periódico
Title: Effect Of Repeated Microwave Disinfections On Bonding Of Different Commercial Teeth To Resin Denture Base.
Author: Consani, Rafael L X
Soave, Tatiane
Mesquita, Marcelo F
Sinhoreti, Mario A C
Mendes, Wilson B
Guiraldo, Ricardo D
Abstract: To verify the influence of repeated microwave disinfections on the shear bond strength of two commercial types of teeth to acrylic resin, when the ridge lap surfaces were unmodified, bur abraded, bur grooved or etched by monomer. Eighty specimens (n = 10) were adhered to the tooth ridge lap surface, polymerised in a water bath at 74°C for 9 h. Microwaved specimens were individually immersed in 150 ml of water and submitted to five simulated disinfections in a microwave oven calibrated at 650 W for 3 min. Control specimens were not microwave treated. Shear bond strength tests were performed in an Instron machine with a cross-speed of 1 mm/min. The fracture load values were transformed into shear bond strength as a function of the bonding area (0.28 cm(2)). Data were submitted to ANOVA and Tukey's test (α = 0.05). Fractured areas were classified as adhesive, cohesive (resin or tooth) or mixed failures. Repeated microwave disinfections increased the shear strength of the tooth/resin bond. Mechanical retention in microwaved and non-microwaved procedures improved the shear bond strength. The different commercial types of teeth influenced shear bond strength values, with Biotone teeth showing the lower values.
Subject: Acid Etching, Dental
Acrylic Resins
Dental Bonding
Dental Etching
Dental Materials
Dental Stress Analysis
Denture Bases
Materials Testing
Organically Modified Ceramics
Shear Strength
Stress, Mechanical
Surface Properties
Time Factors
Tooth, Artificial
Rights: fechado
Identifier DOI: 10.1111/j.1741-2358.2011.00516.x
Date Issue: 2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

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