Release of Organic Compounds by Composites Depending on the Source of Curing Light, Immersion Solution and PH

Abstract

Objectives: This in vitro study evaluated the release of organic compounds by composite KaloreTM (GC FUJI) and FiltekTM Silorane (3M ESPE) by means of fluorescence spectrometry, varying the source of curing light, the immersion solution and the pH of these immersions. Methods: 56 specimens were made for each composite, 28 polymerized with halogen light and 28 with LED light. Samples of each composite were stored in water with neutral or acidic pH and in saliva with acidic or neutral pH (n=7 specimens for each condition examined). The reading was performed between 1 and 672 hours (28 days).The results were statistically analyzed using the Tukey and ANOVA tests, adopting the significance level of 5%. Results: The KaloreTM resin released more organic compounds than FiltekTMSilorane in the aqueous environment, either in the polymerization by the halogen light as by the LED light in both pHs (p<0.05). There was no significant difference in aqueous environment, only when polymerized by halogen light and acid pH (p>0.05). When immersed in artificial saliva, the KaloreTM resin also released more organic compounds than FiltekTMSilorane, but there was only statistically significant difference when polymerized by LED light, both in neutral pH and at acid pH. Both resins released greater amount of organic compounds in aqueous solution, compared to saliva, regardless of the light source and pH (p<0.05). Conclusion: Even the most modern resins such as KaloreTM and FiltekTM Silorane release organic compounds and the polymerization by LED light decreases the liberation of organic compounds by FiltekTM Silorane resin.