Assessing the surface roughness of a posterior resin composite: effect of surface sealing.
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.
Takeuchi
Cristina Yoshie Garcia
CY
Department of Restorative Dentistry, Araraquara Dental School, São Paulo State University (UNESP), Brazil. cristakeuchi@yahoo.com.br
Orbegoso Flores
Victor Humberto
VH
Palma Dibb
Regina Guenka
RG
Panzeri
Heitor
H
Lara
Elza Helena Guimarães
EH
Dinelli
Welingtom
W
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
D003188:Composite Resins; D003802:Dentifrices; C438835:Filtek P60 Composite Resin; D019279:Resin Cements; C115612:single bond; D017438:Bisphenol A-Glycidyl Methacrylate