There is no in vitro evidence to support the choice for nanofill or su bmi cron composites over traditional microhybrids based on better surface smoothness and /or gloss , or based upon maintenance of those superficial characteristics after surface challenges
OBJECTIVES Despite nanofill and su bmi cron composites ' aim to provide high initial polishing combined with superior smoothness and gloss retention , the question still remains whether clinicians should consider using these new material s over traditional microhybrids .
The aim of this paper was to systematic ally review the literature on how nanofills and su bmi crons react to polishing procedures and surface challenges in vitro compared with microhybrids .
The paper has also given an overview of the compositional characteristics of all resin composites and polishing systems whose performance was presented herein .
Effect of Bleaching Gels on Surface Roughness of Nanofilled Composite Resins
Objectives : The aim of this study was to investigate the superficial texture of composite restorations after different bleaching protocol s. Methods : Filtek Supreme ( S ) , Filtek Z350 ( F ) , and Gr and io ( 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 St and ard ( WS ) .  Six specimens from each composite were treated using each bleaching agent , according to the manufacturers ’ instructions . Three r and om 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 , Gr and io 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 material s. 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
There is no in vitro evidence to support the choice for nanofill or su bmi cron composites over traditional microhybrids based on better surface smoothness and /or gloss , or based upon maintenance of those superficial characteristics after surface challenges
OBJECTIVES Despite nanofill and su bmi cron composites ' aim to provide high initial polishing combined with superior smoothness and gloss retention , the question still remains whether clinicians should consider using these new material s over traditional microhybrids .
The aim of this paper was to systematic ally review the literature on how nanofills and su bmi crons react to polishing procedures and surface challenges in vitro compared with microhybrids .
The paper has also given an overview of the compositional characteristics of all resin composites and polishing systems whose performance was presented herein .