NDLI: Effect of Bleaching Gels on Surface Roughness of Nanofilled Composite Resins

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Effect of Bleaching Gels on Surface Roughness of Nanofilled Composite Resins

Content Provider	Semantic Scholar
Author	Wang, Linda Francisconi, Luciana Fávaro Atta, Maria Teresa Santos, Jean Rodrigo Dos Padre, Natália Coelho Del Gonini, Alcides Junior Fernandes, Karen Barros Parron
Copyright Year	2011
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.
Starting Page	173
Ending Page	179
Page Count	7
File Format	PDF HTM / HTML
DOI	10.1055/s-0039-1698876
PubMed reference number	21494385
Journal	Medline
Volume Number	5
Journal	European journal of dentistry
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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