Resumo

VACA, MJ et al. Sorption and solubility of several materials formulated with resin. Av Odontoestomatol [online]. 2003, vol.19, n.6, pp.283-289. ISSN 2340-3152.

The aim of this study was to determine the sorption and solubility of four resin composites: Tetric Ceram (Vivadent), Ecusit (DMG), Degufill (Degussa) and Z-250 (3M-Espe); and two polyacid-modified resins: Luxat (DMG) and lonosit (DMG). Five discs (15 mm x 0.85 mm) of each material were prepared and ground wet to remove poorly polymerized suface layers. Discs were conditioned in a desiccator (37º C) until a constant weight was achieved using an analytic balance (m_o); immersed in distilled water 37º C (m₁) and finally into a vacuum oven (60º C, 24 h) and reweighted (m₂). Sorption (A) and solubility (S) were calculated: A = m₁ - m₂ / V; S = m_o - m₂ / V. ANOVA and SNK tests showed statistical differences among the studied materials. lonosit showed the highest sorption and Tetric Ceram and Ecusit the lowest. Luxat presented higher sorption than Degufill, but both materials showed similar sorption values compared with Z-250. The higher solubility was obtained by lonosit. No statistical differences were found among resin composites and Luxat.

Palavras-chave : Water-sorption; solubility; resin composite; polyacid-modified resin.

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