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Type: Artigo de periódico
Title: Effect of air-drying on the solvent evaporation, degree of conversion and water sorption/solubility of dental adhesive models
Author: Bail, M
Malacarne-Zanon, J
Silva, SMA
Anauate-Netto, A
Nascimento, FD
Amore, R
Lewgoy, H
Pashley, DH
Carrilho, MR
Abstract: This study evaluated protocols to eliminate acetone from dental adhesives and their effect on the kinetic of water sorption and percent of conversion of these adhesives. Experimental methacrylate-based adhesives with increasing hydrophilicity (R2, R3, R5) were used as reference materials. Primer-like solutions were prepared by addition of 50 wt% acetone. Acetone elimination was measured gravimetrically before and after: a spontaneous evaporation, an application of air-drying at room temperature or application of 40 degrees C air-drying. Protocols were performed from 15 to 60 s. Specimens of adhesive/acetone mixtures were photo-activated and tested for degree of conversion, water sorption and solubility. Data were analyzed by ANOVA and Bonferroni's tests (alpha = 0.05). Complete acetone elimination was never achieved, but it was significantly greater after the 40 degrees C air-drying application. Higher acetone elimination was observed for the least hydrophilic adhesive. Longer periods for acetone evaporation and heated air-stream can optimize polymerization and reduce the water sorption/solubility of adhesive system models.
Country: Holanda
Editor: Springer
Rights: fechado
Identifier DOI: 10.1007/s10856-011-4541-y
Date Issue: 2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

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