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CC BY-NC-ND 4.0 · Eur J Dent 2011; 05(02): 173-179
DOI: 10.1055/s-0039-1698876
Original Article
Dental Investigation Society

Effect of Bleaching Gels on Surface Roughness of Nanofilled Composite Resins

Linda Wang
a   Department of Operative Dentistry, Endodontics and Dental Materials of the School of Dentistry of Bauru, University of São Paulo, Bauru, SP, Brazil.
,
Luciana Fávaro Francisconi
a   Department of Operative Dentistry, Endodontics and Dental Materials of the School of Dentistry of Bauru, University of São Paulo, Bauru, SP, Brazil.
,
Maria Teresa Atta
a   Department of Operative Dentistry, Endodontics and Dental Materials of the School of Dentistry of Bauru, University of São Paulo, Bauru, SP, Brazil.
,
Jean Rodrigo dos Santos
b   School of Dentistry of University North of Paraná – UNOPAR, Londrina, PR, Brazil.
,
Natália Coelho Del Padre
b   School of Dentistry of University North of Paraná – UNOPAR, Londrina, PR, Brazil.
,
Alcides Gonini-Júnior
b   School of Dentistry of University North of Paraná – UNOPAR, Londrina, PR, Brazil.
,
Karen Barros Parron Fernandes
b   School of Dentistry of University North of Paraná – UNOPAR, Londrina, PR, Brazil.
› Author Affiliations
Further Information

Publication History

Publication Date:
30 September 2019 (online)

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ABSTRACT

Objectives: The aim of this study was to investigate the superficial texture of composite restorations after different bleaching protocols. Methods: Filtek Supreme (S), Filtek Z350 (F), and Grandio (G) were compared to Opallis (O) and Filtek Z250 (Z) (control microhybrid composites) and to bovine enamel using three different bleaching agents: 35% hydrogen peroxide Whiteness HP (WHP), 35% Whiteness HP MAXX (WMAXX) and 16% carbamide peroxide Whiteness Standard (WS). Six specimens from each composite were treated using each bleaching agent, according to the manufacturers’ instructions. Three random sites were measured for superficial roughness (Hommel Tester T 1000) weekly for each sample. Data were analyzed for each bleaching system using two-way ANOVA and Bonferroni tests at 5% significance level. Results: WHP treatment significantly altered the Filtek Supreme composite over time. When WMAXX was used, Grandio displayed the most significant alterations in surface roughness throughout the evaluation period, which was not observed for the other nanocomposites. Using WS, Filtek Z250 presented significant surface alterations over time, which was not seen in the nanofilled materials. Conclusions: Surface roughness alteration was material and time-dependent. The bleaching gels affected nanofilled and microhybrid composite resins. Enamel was the surface less affected by bleaching. (Eur J Dent 2011;5:173-179)

Key words:

Tooth bleaching - Nanotechnology - Resin composites - Surface roughness
 

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