Cilingir, AylinKariper, Engin2024-06-122024-06-1220231606-51311605-8127https://doi.org/10.1515/rams-2022-0334https://hdl.handle.net/20.500.14551/19191The aim of this study is to evaluate the effect of an office bleaching agent on the color of various single-shade resin composites. Three single-shade resin composites were tested in this study. Thirty disk-shaped specimens were prepared with a diameter of 10 mm and a height of 1 mm, and they were divided into three groups (n = 10). After color measurements, 40% hydrogen peroxide containing bleaching agent gel was applied to all the specimens. Baseline and final color measurements were performed using a clinical spectrophotometer. Statistical analyses were performed. All bleached specimens had clinically incomprehensible color changes (?E < 3.3). Comparisons for single-shade composites revealed no statistically significant color difference between groups. With the limitation of this study in mind, color changes in single-shade resin-composites after office bleaching were found to be clinically acceptable. It may be appropriate to use single-shade composites that shorten the in-chair clinical time by facilitating shade selection.en10.1515/rams-2022-0334info:eu-repo/semantics/openAccessBlendingChameleon EffectSingle-Shade Universal CompositeOffice BleachingColor MatchingHydrogen-PeroxideTranslucencyAgentsHardnessTeethArticle621N/AWOS:0010444412000012-s2.0-85168253544Q2