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Updated: Mar 18, 2026
Evaluating the Effects of Different Polishing Methods on Color Stability of Dental Restorations in Pediatric Dentistry
Published on: June 6, 2025
Effects of staining and bleaching on a nanohybrid composite with or without surface sealant
Derya Merve Halacoglu1, Kıvanc Yamanel1, Saffet Basaran1
1Department of Restorative Dentistry, School of Dentistry, Baskent University, Ankara, Turkiye.
Objective:
The effect of different staining solutions and a bleaching procedure on color stability and surface roughness of a nanohybrid resin composite were evaluated with or without liquid resin polishing (RP).
Materials And Methods:
Ninety-six disc-shaped resin composite specimens (A1 Shade, Z550 Filtek 3M ESPE, St. Paul, MN, USA) were prepared and divided randomly into two groups (n = 48). Liquid RP (BisCover LV, Bisco Inc., Schaumburg, IL, USA) was applied in one group (RP) and not in the other (P). Specimen color and surface roughness were determined using a colorimeter and profilometer, respectively. After baseline measurements, each group was divided into four subgroups (n = 12) for immersion in a control (distilled water) or three different staining solutions (ice tea, red wine, and cola) for 1 week. Color and surface roughness were then reevaluated. After measurements, all specimens were bleached using a 35% hydrogen peroxide gel. The color and surface roughness of the specimens were reevaluated.
Statistical Analysis:
Data were subjected to an analysis of variance for repeated measurements among the groups (P < 0.05).
Results:
Staining and bleaching did not change the surface roughness of the RP and P groups (P > 0.05). Discoloration in the red wine group was higher than for the other staining solutions for the RP (P < 0.001) and P groups (P = 0.018).
Conclusion:
Application of liquid RP did not enhance the color stability and surface roughness of the composite resin restoration.
