title: Assessing the surface roughness of a posterior resin composite: effect of surface sealing.
abstract: This study assessed the in vitro influence of surface sealing on the surface roughness of a posterior resin composite before and after toothbrushing. Thirty specimens (13 mm diameter x 1 mm high) were fabricated from Filtek-P60 resin composite and randomly assigned to three groups (n = 10): a non-sealed control and two groups sealed with one of the tested materials-a surface-penetrating sealant (Protect-it!-PI) and a one bottle adhesive system (Single Bond-SB). The samples were subjected to a surface roughness reading to determine the initial roughness, then submitted to simulated toothbrushing with 35,600 cycles for 100 minutes. Specimens were then cleaned and a post-abrasion surface roughness reading accomplished. Means (microm), recorded before (B) and after (A) toothbrushing, and standard deviations were: Control--(B): 0.032 (+/- 0.005), (A): 0.054 (+/- 0.005); PI-(B): 0.034 (+/- 0.005), (A): 0.060 (+/- 0.034); SB (B): 0.031 (+/- 0.004), (A): 0.047 (+/- 0.007). Data were tabulated and submitted to two-way ANOVA. No statistically significant difference was observed when the control and experimental groups were compared. However, a significant difference (p < 0.05) was found between the measurements performed before and after toothbrushing. Based on these results, it may be concluded that using either a surface penetrating sealant or a one bottle adhesive system did not provide the optimization of superficial integrity. The use of a dentifrice and toothbrush resulted in significant alterations to the surface smoothness of the resin composite.
authors.affiliation: Department of Restorative Dentistry, Araraquara Dental School, São Paulo State University (UNESP), Brazil. cristakeuchi@yahoo.com.br
authors.forename: Cristina Yoshie Garcia
authors.initials: CY
authors.lastname: Takeuchi
authors.forename: Victor Humberto
authors.initials: VH
authors.lastname: Orbegoso Flores
authors.forename: Regina Guenka
authors.initials: RG
authors.lastname: Palma Dibb
authors.forename: Heitor
authors.initials: H
authors.lastname: Panzeri
authors.forename: Elza Helena Guimarães
authors.initials: EH
authors.lastname: Lara
authors.forename: Welingtom
authors.initials: W
authors.lastname: Dinelli
mesh_terms: D000704:Analysis of Variance; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D019554:Dental Restoration Wear; D003793:Dental Restoration, Permanent; D003802:Dentifrices / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D019279:Resin Cements / Q000737:chemistry; D013499:Surface Properties; D014099:Toothbrushing
chemical_list: D003188:Composite Resins; D003802:Dentifrices; C438835:Filtek P60 Composite Resin; D019279:Resin Cements; C115612:single bond; D017438:Bisphenol A-Glycidyl Methacrylate