BOGDAN MUNTEANU, SORIN ANDRIAN, GIANINA IOVAN, ANGELA GHIORGHE, IRINA NICA, SIMONA STOLERIU Influence of Different Bleaching Agents on Surface  Roughness of Composite Resins Filling

BOGDAN MUNTEANU, SORIN ANDRIAN, GIANINA IOVAN, ANGELA GHIORGHE, IRINA NICA, SIMONA STOLERIU Influence of Different Bleaching Agents on Surface Roughness of Composite Resins Filling

Abstract:
The aim of this study was to evaluate the effects of one in-office and two home bleaching agents on the surface roughness of a hybrid, microhybrid and nanohybrid composite resin. Three composite resins (Valux Plus, 3M ESPE, Filtek Z 250, 3M ESPE, and Herculite XRV Ultra, Kerr) and three bleaching agents (Opalescence PF, Ultradent Products, Perfect Bleach, Voco, and Perfect BleachOffice +, Voco) were chosen for this study. Twenty eight samples of each composite resin were prepared and were equally split in 4 groups: 7 samples were stored in distilled water (control group), 7 samples were subject to 17% carbamide peroxide gel (Perfect Bleach) action for 3 h a day, 7 days, 7 samples were subject to 15% carbamide peroxide gel (Opalescence PF) action for 3 h a day, 7 days and 7 samples were subject to 35% hydrogen peroxide gel (Perfect BleachOffice +) action two times for 15 min . After cleaning the samples were submitted to roughness evaluation using atomic force microscopy (AFM). Bleaching agents that contain 35% hydrogen peroxide and 17% or 15% carbamide peroxide increased the composite resins surface roughness. The hybrid resin recorded the highest roughness after bleaching, followed in descending order by microhybrid and nanohybrid composite resins. Keywords: bleaching agent, composite resin, roughness evaluation, carbamide peroxide, atomic force microscopy

Issue: 2014 Volume 51, Issue 3

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Publication date: 2014/9/30