Effect of Acidic Drinks on Color Stability of Different Direct Bulk-Fill Resin Composite Restorations

Introduction: Although resin composite restoration is now considered one of the most commonly used esthetic restoratives, color stability of restorations is the major demand for a successful and durable restoration. However acidic drinks have a discoloring effect on it
Aim of the study: This study aimed to evaluate the effect of acidic drinks on color stability of different direct Bulk-Fill Resin composite restorations.
Materials and methods: A total of 90 standardized disc shaped specimens were constructed, 30 from each restorative material (n=30), Filtek bulk-fill Posterior Restorative, TetricEvoCeram bulk-fill, and SonicFill resin composites using a customized split Teflon mold, with an internal space of 10mm diameter and 2mm thickness. Each specimen was photo-cured for 20 seconds, using a LED curing unite. Specimens of each restorative material were divided into three subgroups according to storage media used to store in (n=10); orange juice, Coca cola and artificial saliva. Color measurements were recorded for all specimens using Spectrophotometer before and after storage for 48 hour in the media. Finally, the values of ΔE were submitted to statistical analysis.
Results: Coca Cola caused the highest degree of discoloration of the resin composites, to be followed by Orange juice with the least color changes were noticed with storage in the Artificial saliva (p <0.0001) . Regarding to the bulk-fill resin composites, Filtek Posterior revealed the lowest levels of color change while the highest levels of discoloration were noticed with SonicFill bulk-fill resin composite, regardless the type of storage media (p > 0.05).
Conclusion: Bulk-fill resin composites, investigated in this study, showed less color stability than incremental resin composites. Acidic drinks have deteriorating effects on color of resin composite restorations.