The Effect of Various Polishing Systems on the Surface Roughness of Two Resin Composites—An In Vitro Study

The long-term success of a composite restoration largely depends on its smoothness, which can be achieved by the appropriate polishing tools and material selection. purpose this study was to evaluate surface roughness two materials after application selected systems. Filtek Ultimate (FU) Z250 (FZ) were tested. Forty specimens each prepared. After polymerization under Mylar strip, five samples from group measured. Subsequently, all ground 600 grit sandpaper. per tested again. randomly assigned eight subgroups, polished Sof-Lex, Sof-Lex Diamond Polishing System, Super Snap, One Gloss, Astrobrush, Stainbuster, Enamel Shiny, Jiffy System. collected data analyzed using Shapiro–Wilk Kruskal–Wallis tests. lowest Ra coefficient is found in Snap groups (FU—0.077 μm, FZ—0.085 μm). Rlr measured Shiny for FU (1.000), Kit FZ (1.001), only slightly higher (FU—1.001, FZ—1.002). roughest-measured Gloss (Ra—0.657 µm, Rlr—1.009), Astrobrush (Ra—0.525 Rlr—0.011). Additionally, it not confirmed that nanoparticle demonstrates better results than microhybrid one (FZ). Different systems produce varying roughness. most effective system Snap. structure composites does significantly affect their polishing.