Effect of Wet and Dry Polishing Conditions by Two Finishing and Polishing Systems on the Surface Roughness and Color Changes of Two Composite Resin Restoratives: An In Vitro Comparative Study

Purpose: The study aimed at evaluating the effect of wet and dry polishing systems on the resin composites' surface roughness and color change. Materials and Methods: In the study, samples were prepared using nanoceramic (Ceram.x one) and nanohybrid (GrandioSO) resin composites. Two different finishing and polishing systems were used in the polishing of resin composites. Resin composite surfaces were finished and polished under wet and dry conditions. The initial surface roughness values (Ra) of the samples were measured using a profilometer, whereas the color changes were measured using a spectrophotometer. Then, the colors of the samples kept in coffee were measured on the 7th and 30th days. Surface roughness and color change values (Delta E-00) were measured and statistically analyzed using the one-way analysis of variance (ANOVA) test (P < .05). Results: Wet or dry use of polishing systems did not show a statistically significant difference between the surface roughness values of the resin composite (P < .05). Wet and dry use of polishing systems showed similar color changes on the composite resins (P < .05). Diamond-containing spirals on composite resins showed statistically less color change than aluminum-oxide-containing discs (P < .05). Wet or dry use of polishing systems did not reduce the color change of the composite resins below the acceptability threshold (AT). Conclusion: Wet or dry use of polishing systems on composite resins did not affect surface roughness and color change. The use of diamond-containing polishing spirals that cause less color change can increase clinical success.