In Vitro Analysis of Different Polishing Systems on the Color Stability and Surface Roughness of Nanocomposite Resins

Aim: To assess the different polishing systems on the color stability and surface roughness of nanocomposite resins. Materials and methods: A total of 60 composite resin samples were fabricated. The Tetric N Ceram composite was compacted into the custom-made cylindrical metallic mold of internal diameter 6 × 6 mm. Based on the polishing system used, sixty samples were divided into three groups. Group I: Sof-Lex, group II: Shofu super-snap polishing disks, and group III: Astropol. The samples in each group were immersed in beverage, that is tea. Spectrophotometer was used to measure the color of the samples after staining period. And surface profilometer was used to measure all surface roughness. Results: Of the three groups, Sof-Lex polishing group reported the least mean value of 0.458 ± 0.118 succeeded by Astropol polishing group (0.494 ± 0.121) and Shofu super-snap polishing group (0.540 ± 0.031) having the higher mean value. Statistically significant difference was found between the different polishing systems calculated by analysis of variance. And color change between the groups was not statistically significant. Conclusion: We conclude that a composite polished with Sof-Lex was a superior polish compared to Astropol polishing group and Shofu super-snap polishing group. There was only a minimal difference in the color stability of the composite between the groups. Clinical significance: Excellent finishing and polishing are the critical steps to enhance the esthetics and longevity of the composite restorations. High strength, fracture toughness, surface hardness, optimum polishability, and gloss are the functional properties which need assessment while a resin composite is used for restoration.