title: Effect of time on the diametral tensile strength of resin-modified restorative glass ionomer cements and compomer.
abstract: The aim of this study was to analyze the diametral tensile strengths of three resin-modified restorative glass ionomer cements--Vitremer, Fuji II LC and Photac Fil and one compomer--Dyract. They were tested at 1 hour, 1 day and 1 week. Kratos testing machine was used to load the specimens at a cross-head speed of 0.5 mm/min. The data were analyzed by two-way ANOVA and Tukey's test that showed statistically significant differences among the materials. The tested materials presented an increase in strength from 1 hour to 1 week and were as follows for each material respectively: Vitremer (19.22-27.29), Fuji II LC (23.91-28.67), Photac Fil (19.35-22.86), Dyract (28.83-46.95). Dyract presented the highest strengths.
authors.affiliation: Department of Dentistry, Faculty of Dentistry of Bauru, University of São Paulo, Bauru, SP, Brazil.
authors.forename: D F
authors.initials: DF
authors.lastname: Cefaly
authors.forename: F P
authors.initials: FP
authors.lastname: Valarelli
authors.forename: B G
authors.initials: BG
authors.lastname: Seabra
authors.forename: R F
authors.initials: RF
authors.lastname: Mondelli
authors.forename: M F
authors.initials: MF
authors.lastname: Navarro
mesh_terms: D000704:Analysis of Variance; D020770:Compomers; D003188:Composite Resins; D001840:Dental Bonding; D005899:Glass Ionomer Cements; D008422:Materials Testing; D008689:Methacrylates; D011108:Polymers / Q000737:chemistry; D012117:Resins, Synthetic; D017640:Silicates; D018709:Statistics, Nonparametric; D013718:Tensile Strength; D013997:Time Factors
chemical_list: D020770:Compomers; D003188:Composite Resins; C088486:Dyract; C079765:Fuji II LC cement; D005899:Glass Ionomer Cements; D008689:Methacrylates; C081144:Photac-Fil; D011108:Polymers; D012117:Resins, Synthetic; D017640:Silicates; C084550:Vitremer