Document Type : Original Articles

Abstract

Introduction: In addition to color, translucency is one of the primary factors influencing the esthetics of a dental prosthesis. The aim of this study was to determine the effect of water storage on translucency of reinforced composite resins. Materials and Methods: In this experimental study, six C1-shade dentin samples from Belleglass and Gradia reinforced composite resins were prepared and divided into two groups: The samples in one group were stored in 37ºC distilled water and the samples in the other group were kept in a dry environment. The samples in both groups were stored at 370C in an incubator for one month. Then, sample translucency was calculated using the contrast ratio. Statistical analysis was performed by two-way ANOVA and Mann-Whitney test (α = 0.05).  Results: No significant differences were observed in contrast ratios between the wet and dry storage conditions of Belleglass samples or Gradia samples (p value = 0.827). However, significant differences were observed between contrast ratios of Belleglass and Gradia in wet and dry storage conditions (p value = 0.05), revealing that in both dry and wet storage conditions Belleglass was more translucent than Gradia. Conclusion: Within the limitations of this study, both Belleglass and Gradia were stable in translucency after water storage. However, Belleglass was more translucent than Gradia in both dry and wet storage conditions.   Key words: Composite resin, Reinforced composite resin, Tooth translucency.