title: Chemical and morphological features of nanofilled composite resin: influence of finishing and polishing procedures and fluoride solutions.
abstract: This study evaluated the influence of finishing and polishing procedures and different fluoride solutions on superficial morphology and chemistry of the nanofilled composite resin Supreme XT (3M) through the EDX analysis and SEM evaluation. Circular specimens (n = 30) of 10 mm diameter and 2 mm thickness were prepared, with half of the sample assays finished and polished with Super-Snap® sandpaper. The experimental groups were divided according to the presence or absence of finishing and polishing and solutions (artificial saliva, 0.05% of manipulated sodium fluoride solution, Fluordent Reach, Oral B, Fluorgard). Specimens were immersed in each respective solution for 1 min per day, during 60 days and stored in artificial saliva at 37 ± 1°C between immersion periods. Topography and chemical analysis was qualitative. It was observed that specimens submitted to finishing and polishing procedures had lower superficial degradation. Fluoride solutions promoted superficial alterations on specimens, being the highest degradation obtained with Fluordent Reach. It can be concluded that finishing and polishing procedures and the immersion media influence the superficial morphology of composite resin tested; the Fluordent Reach was the fluoride solution that most affected the material's surface.
authors.affiliation: Department of Pediatric Dentistry, Araraquara School of Dentistry, University of São Paulo State, São Paulo, Brazil. analuisabotta@hotmail.com
authors.forename: Ana Luísa Botta Martins
authors.initials: AL
authors.lastname: de Oliveira
authors.forename: Patrícia Aleixo Dos Santos
authors.initials: PA
authors.lastname: Domingos
authors.forename: Regina Guenka
authors.initials: RG
authors.lastname: Palma-Dibb
authors.forename: Patrícia Petromilli Nordi Sasso
authors.initials: PP
authors.lastname: Garcia
mesh_terms: D003188:Composite Resins / Q000032:analysis / Q000737:chemistry*; D003775:Dental Polishing / Q000379:methods*; D004577:Electron Probe Microanalysis; D000431:Ethanol / Q000737:chemistry; D007101:Immersion; D008422:Materials Testing / Q000379:methods; D008855:Microscopy, Electron, Scanning; D053761:Nanocomposites / Q000737:chemistry*; D012464:Saliva, Artificial / Q000737:chemistry; D012969:Sodium Fluoride / Q000737:chemistry*; D012996:Solutions / Q000737:chemistry; D013499:Surface Properties; D013997:Time Factors
chemical_list: D003188:Composite Resins; D012464:Saliva, Artificial; D012996:Solutions; D000431:Ethanol; D012969:Sodium Fluoride