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. 2016 Jul-Sep;10(3):361-365.
doi: 10.4103/1305-7456.184148.

Effects of staining and bleaching on a nanohybrid composite with or without surface sealant

Derya Merve Halacoglu  1 , Kıvanc Yamanel  1 , Saffet Basaran  1 , Duygu Tuncer  1 , Cigdem Celik  1
Affiliations

Effects of staining and bleaching on a nanohybrid composite with or without surface sealant

Derya Merve Halacoglu et al. Eur J Dent. 2016 Jul-Sep.

Abstract

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.

Keywords: Bleaching; nanohybrid composite; staining; surface roughness; surface sealant.

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