Effect of Different Finishing/Polishing Systems on Surface Roughness of Silorane Based Composites

Abstract

Aim: The purpose of this study was to evaluate the effect of different finishing/polishing systems on the surface roughness of a silorane -based composite and to compare it with a methacrylate-based composite.

Materials and Methods: 60 cylindrical discs were prepared using a Teflon mold (5mm diameter,2mm height) of one silorane- based composite (Filtek P90-3M ESPE) and one methacrylate-based composite (Filtek Z250XT-3M ESPE), 30 specimens of each, and were light cured ( Elipar -3M ESPE -1000 mw/cm²-20 seconds). Specimens were stored in 37º distilled water for 24h. Each material group was divided into 3 subgroups (n=10) according to the finishing /polishing system used (Sof-lex XT Discs- 3M ESPE), (Sof-lex-Spiral Wheels- 3M ESPE) and (Astropol-Ivoclar Vivadent). Surface roughness  was measured by TR200 hand-held roughness tester. Data were statistically analyzed using one-way ANOVA and Bonferroni Post-Hoc and T Student tests at significance level (P<0.05).

Results: No significant differences were found in  values between finishing/polishing systems in silorane-based composite group P90 (P=0.725). In methacrylate-based composite Z250XT group, Sof-lex XT showed the lowest  values with significant differences when compared with Astropol and Spiral Wheels (P=0.000). No significant differences were found between composites in Sof-lex XT finishing/polishing system (P=0.732), while  values in silorane- based composite P90 were lower than in methacrylate-based composite Z250XT with significant differences in both Astropol and Spiral Wheels finishing/polishing systems (P=0.000).

Conclusions: Surface roughness of silorane composite wasn't affected by the finishing/polishing system, and the polishing action of Sof-lex XT Discs wasn't influenced by the composite type used in this study.