Objetivo: Evaluar la rugosidad superficial de resinas compuestas con nanopartículas sometidas a dos sistemas de pulido. Método: Este estudio experimental in vitro, prospectivo, comparativo y longitudinal fue conformado por 32 especímenes de resina fabricados según la norma ISO 4049-2019 y divididas equitativamente en cuatro grupos: A1: Palfique LX5 / Sof-Lex, A2: Palfique LX5 / Super Snap, B1: Filtek Z350 XT / Sof-Lex, y B2: Filtek Z350 XT / Super Snap. Las muestras se almacenaron en agua destilada a 37°C durante 24 h. La rugosidad de la superficie se midió con un medidor de rugosidad digital antes y después del procedimiento de pulido. Los datos se analizaron con la prueba t de Student para muestras relacionadas, y con la prueba ANOVA entre sujetos con dos factores; considerando la significación a P < 0,05. Resultados: La rugosidad de la superficie no mostró diferencias signifi...

The use of bleaching agents, despite being a conservative treatment, can cause a decrease in the surface microhardness of dental resins, affecting their aesthetics and performance. The aim of this study was to evaluate the in vitro effect of polishing on the surface microhardness of nanohybrid composite resins that were subjected to bleaching with 35% hydrogen peroxide. Materials and Methods: This cross-sectional, in vitro experimental study consisted of 30 composite resin samples made according to ISO 4049-2019 and divided equally into two groups (A and B) which were subjected to 35% hydrogen peroxide bleaching. Group A was subjected to polishing procedure, whereas group B was the control group. The samples were stored in distilled water at 37°C for 24 h. The Vickers microhardness was determined with a load of 100 g-f for 10 s. The data were analyzed with Student’s t-test for indepen...