title: Effect of different surface penetrating sealants on the roughness of a nanofiller composite resin.
abstract: This study evaluated the effectiveness of different sealants applied to a nanofiller composite resin. Forty specimens of Filtek Z-350 were obtained after inserting the material in a 6x3 mm stainless steel mold followed by light activation for 20 s. The groups were divided (n=10) according to the surface treatment applied: Control group (no surface treatment), Fortify, Fortify Plus and Biscover LV. The specimens were subjected to simulated toothbrushing using a 200 g load and 250 strokes/min to simulate 1 week, 1, 3 and 6 months and 1 and 3 years in the mouth, considering 10,000 cycles equivalent to 1 year of toothbrushing. Oral-B soft-bristle-tip toothbrush heads and Colgate Total dentifrice at a 1:2 water-dilution were used. After each simulated time, surface roughness was assessed in random triplicate readings. The data were submitted to two-way ANOVA and Tukey's test at a 95% confidence level. The specimens were observed under scanning electron microscopy (SEM) after each toothbrushing cycle. The control group was not significantly different (p>0.05) from the other groups, except for Fortify Plus (p<0.05), which was rougher. No significant differences (p>0.05) were observed at the 1-month assessment between the experimental and control groups. Fortify and Fortify Plus presented a rougher surface over time, differing from the baseline (p<0.05). Biscover LV did not differ (p>0.05) from the baseline at any time. None of the experimental groups showed a significantly better performance (p>0.05) than the control group at any time. SEM confirmed the differences found during the roughness testing. Surface penetrating sealants did not improve the roughness of nanofiller composite resin.
authors: Department of Dentistry, Dental School, UNOPAR - University of North Parana, Londrina, PR, Brazil. baenalopes@gmail.com
authors: Murilo Baena
authors: MB
authors: Lopes
authors: Paulo Cesar
authors: PC
authors: Saquy
authors: Sandra Kiss
authors: SK
authors: Moura
authors: Linda
authors: L
authors: Wang
authors: Fabiana Mezzaroba Ortenzi
authors: FM
authors: Graciano
authors: Lourenço
authors: L
authors: Correr Sobrinho
authors: Alcides
authors: A
authors: Gonini Júnior
mesh_terms: D000179:Acrylates / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D003764:Dental Materials / Q000737:chemistry*; D006801:Humans; D055115:Light-Curing of Dental Adhesives; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D053761:Nanocomposites / Q000737:chemistry*; D058105:Polymerization; D019279:Resin Cements / Q000737:chemistry*; D013314:Stress, Mechanical; D013499:Surface Properties; D013997:Time Factors; D014099:Toothbrushing / Q000295:instrumentation; D014100:Toothpastes / Q000737:chemistry
chemical_list: D000179:Acrylates; C481141:BisCover; D003188:Composite Resins; D003764:Dental Materials; C095811:Fortify sealant; D019279:Resin Cements; D014100:Toothpastes; C533204:filtek Z350