COMPARISON OF SURFACE ROUGHNESS OF NANOFILLED AND NANOHYBRID RESIN COMPOSITES AFTER USING DIFFERENT POLISHING SYSTEMS

Abstract

Objective: The aim of this study was to compare the surface roughness of nanofilled and nanohybrid resin composites after polishing with four different systems. Materials and methods: Twenty composite specimens were made in square stainless steel mold for each resin composites (total = 40 specimens, n = 5 for subgroup). Dimension of each specimen is 10x10x2 mm. The surface roughness of specimens were subsequently measured using profilometer for statical comparison. Results were analysed by two-way ANOVA and Bonferroni multiple comparison tests (p < 0.05). Results: Both material type and polishing system significantly affected surface roughness (p < 0.05). Among the polishing systems, Sof-Lex Disc produced the lowest surface roughness values, which were statistically lower compared with the other groups (p < 0.05). When comparing the two resin composites, Brilliant EverGlow demonstrated significantly smoother surfaces than Filtek Z350XT (p < 0.05) when polished with the Enhance®/PoGo® system. Conclusion: Within the limitations of this study, both Filtek Z350XT and Brilliant EverGlow showed the lowest surface roughness values when polished with the Sof-Lex Disc system, indicating that the choice of polishing system plays a critical role in achieving optimal surface smoothness.