title: Effect of different polishing systems on the surface roughness of microhybrid composites.
abstract: The use of composite resins in dentistry is well accepted for restoring anterior and posterior teeth. Many polishing protocols have been evaluated for their effect on the surface roughness of restorative materials. This study compared the effect of different polishing systems on the surface roughness of microhybrid composites. Thirty-six specimens were prepared for each composite $#91;Charisma (Heraeus Kulzer), Fill Magic (Vigodent), TPH Spectrum (Dentsply), Z100 (3M/ESPE) and Z250 (3M/ESPE)] and submitted to surface treatment with Enhance and PoGo (Dentsply) points, sequential Sof-Lex XT aluminum oxide disks (3M/ESPE), and felt disks (TDV) combined with Excel diamond polishing paste (TDV). Average surface roughness (Ra) was measured with a mechanical roughness tester. The data were analyzed by two-way ANOVA with repetition of the factorial design and the Tukey-Kramer test (p<0.01). The F-test result for treatments and resins was high (p<0.0001 for both), indicating that the effect of the treatment applied to the specimen surface and the effect of the type of resin on surface roughness was highly significant. Regarding the interaction between polishing system and type of resin used, a p value of 0.0002 was obtained, indicating a statistically significant difference. A Ra of 1.3663 was obtained for the Sof-Lex/TPH Spectrum interaction. In contrast, the Ra for the felt disk+paste/Z250 interactions was 0.1846. In conclusion, Sof-Lex polishing system produced a higher surface roughness on TPH Spectrum resin when compared to the other interactions.
authors.affiliation: Department of Biomaterials and Oral Biochemistry, Dental School, University of São Paulo, SP, Brazil.
authors.forename: Kristine Guará Brusaca Almeida
authors.initials: KG
authors.lastname: Scheibe
authors.forename: Karoline Guará Brusaca
authors.initials: KG
authors.lastname: Almeida
authors.forename: Igor Studart
authors.initials: IS
authors.lastname: Medeiros
authors.forename: José Ferreira
authors.initials: JF
authors.lastname: Costa
authors.forename: Cláudia Maria Coêlho
authors.initials: CM
authors.lastname: Alves
mesh_terms: D000537:Aluminum Oxide; D000704:Analysis of Variance; D003188:Composite Resins; D003775:Dental Polishing / Q000379:methods*; D018130:Diamond; D008422:Materials Testing; D018709:Statistics, Nonparametric; D013499:Surface Properties
chemical_list: D003188:Composite Resins; D018130:Diamond; D000537:Aluminum Oxide