ArticleBMC oral health2026
Effects of surface treatment methods on the color stability, whiteness, and surface roughness of bleach-shade composite resins.
Article in BMC oral health, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundDespite the increasing use of bleach-shade composite resins in recent years, studies examining the optical properties of these materials remain limited. Furthermore, there are insufficient data on the effectiveness of surface treatments for removing stains from these materials. This study evaluated the effects of different surface treatment protocols on the color stability, whiteness index, and surface roughness of bleach-shade composite resins after coffee immersion.
methodsA total of 300 specimens were prepared from four bleach-shade composite resins (Estelite Asteria BL, Brilliant EverGlow BL Translucent, G-aenial A'chord BW, and Opallis E-Bleach L) and one multi-shade (Filtek Z250 A2) composite resin (n = 60 per material). The specimens were randomly allocated to six groups (n = 10): Group 1 (one-step polishing, OptraGloss), Group 2 (two-step polishing, Nova Twist), Group 3 (bleaching, Whiteness HP), Group 4 (bleaching + one-step polishing), Group 5 (bleaching + two-step polishing), and Group 6 (control). All specimens were immersed in a coffee solution for 12 days. Measurements (color and roughness [Ra]) were performed at baseline (t
resultsAt the t
conclusionsCoffee exposure adversely affected the optical and surface properties of bleach-shade composite resins. Bleaching alone showed limited effectiveness, whereas polishing improved the esthetic outcomes and maintained clinically acceptable surface characteristics. Material-dependent differences were observed among the tested composites.
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