SOLUBILITY OF NANOFILLED VERSUS CONVENTIONAL COMPOSITES.

Solubility of resin-based composite materials is of great importance in restorative dentistry, since inorganic ions present as fillers within composites can leach into the surrounding environment resulting in breakdown of the restoration. The aim of this study was to evaluate and compare solubility values of three different nanofilled light-activated composites with other four conventional composite dental materials. Seven commercial light-activated composite materials: Tetric Evo Ceram, Premise, Herculite, Z100, Z250, P60, SupremeXT. Ten disc specimens were prepared for each composite material using a stainless steel mold with 15 mm in inner diameter and 1 mm in thickness. The curing of each composite specimen was divided into five segments and each segment was photo-cures for 40 seconds. Water solubility of different materials was calculated by means of weighting the samples before and after water immersion (15 days) and desiccation. Data were analyzed by one-way ANOVA at 5% level of significance. Tetric Evo Ceram composite showed the lowest solubility values, while Premise composite dis- played the highest values. Solubility values of the tested composites did not show significant differences among them (P>0.05). All the composites being tested in this study exhibited solubility values within the acceptable limits and composite composition is insignificantly influences its water solubility values. [ABSTRACT FROM AUTHOR]

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