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http://repositorio.unicamp.br/jspui/handle/REPOSIP/348537
Type: | Artigo |
Title: | Water sorption of CH3- and CF3-Bis-GMA based resins with additives |
Author: | Prakki, Anuradha Cilli, Renato Vieira, Ian Matos Dudumas, Kristina Pereira, José Carlos |
Abstract: | To evaluate the effect of additives on the water sorption characteristics of Bis-GMA based copolymers and composites containing TEGDMA, CH3Bis-GMA or CF3Bis-GMA. Material and methods: Fifteen experimental copolymers and corresponding composites were prepared combining Bis-GMA and TEGDMA, CH3Bis-GMA or CF3Bis-GMA, with aldehyde or diketone (24 and 32 mol%) totaling 30 groups. For composites, barium aluminosilicate glass and pyrogenic silica was added to comonomer mixtures. Photopolymerization was effected by 0.2 wt% each of camphorquinone and N,N-dimethyl-p-toluidine. Specimen densities in dry and water saturated conditions were obtained by Archimedes' method. Water sorption and desorption were evaluated in a desorption-sorption-desorption cycle. Water uptake (%WU), water desorption (%WD), equilibrium solubility (ES; µg/mm3), swelling (f) and volume increase (%V) were calculated using appropriate equations. Results: All resins with additives had increased %WU and ES. TEGDMA-containing systems presented higher %WU, %WD, ES, f and %V values, followed by resins based on CH3Bis-GMA and CF3Bis-GMA. Conclusions: Aldehyde and diketone led to increases in the water sorption characteristics of experimental resins. |
Subject: | Solubilidade Resinas compostas Polimerização |
Country: | Brasil |
Editor: | USP/Faculdade de Odontologia de Bauru |
Rights: | Aberto |
Identifier DOI: | 10.1590/S1678-77572012000400014 |
Address: | https://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572012000400014 |
Date Issue: | 2012 |
Appears in Collections: | FOP - Artigos e Outros Documentos |
Files in This Item:
File | Description | Size | Format | |
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S1678-77572012000400014.pdf | 157.75 kB | Adobe PDF | View/Open |
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