title: Analysis of surface roughness of glass-ionomer cements and compomer.
abstract: The purpose of this study was to evaluate the surface roughness of two glass-ionomer cements (Vitremer and Chelon-Fil), and one compomer (Dyract) when submitted to different finishing/polishing procedures at different times. A hundred 80-sample discs were made of each material and randomly divided into six finishing/polishing groups: mylar strip (control); Sof-Lex discs; diamond burs; diamond burs/Sof-Lex discs; 30-fluted carbide bur; 30-fluted carbide bur/Sof-Lex discs. These procedures were carried out immediately after preparation of the samples, after 24 and 168 h. Average surface roughness (Ra) was measured with a profilometer and the values were compared using anova (P < 0.05). The smoothest surface for all materials was obtained when cured in contact with the mylar strip. All other tested products increased surface roughness of restorative materials, but Sof-lex discs lead to better results. The worst results were verified with diamond burs. The finishing/polishing procedures, when performed immediately, can improve the roughness of glass-ionomer cements but not of the compomer tested.
authors.affiliation: Department of Surgery and Integrated Clinic, School of Dentistry of Araçatuba - UNESP, Araçatuba, São Paulo, Brazil. pedrini@foa.unesp.br
authors.forename: D
authors.initials: D
authors.lastname: Pedrini
authors.forename: M S M
authors.initials: MS
authors.lastname: Candido
authors.forename: A L
authors.initials: AL
authors.lastname: Rodrigues
mesh_terms: D000704:Analysis of Variance; D020770:Compomers / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry; D003775:Dental Polishing / Q000379:methods*; D003793:Dental Restoration, Permanent; D004867:Equipment Design; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D013499:Surface Properties
chemical_list: D020770:Compomers; D003188:Composite Resins; C088486:Dyract; D005899:Glass Ionomer Cements; C084550:Vitremer; C068076:Chelon Fil