title: In vitro microhardness of glass ionomer cements.
abstract: This study evaluated the surface microhardness of four glass ionomer cements and a composite resin (Fuji IX, Ketac Molar, Vidrion R, Vitromolar and Z 250). Ten specimens of each glass ionomer cement with 8.0 mm diameter and 5.0 mm high dimensions were made and Vicker's microhardness measurements were taken at 1 day and 1 week after initial setting reaction. The results were analyzed using Student's T test and Tukey test (p < 0.05) and demonstrated that the values of microhardness increased after 1 week, with the exception of Fuji IX. Resin composite Z250 presented the greatest values for microhardness.
authors.affiliation: Department of Pediatric Dentistry and Orthodontic, Araraquara Dental School, University of São Paulo State, UNESP, São Paulo, Brazil.
authors.forename: R C
authors.initials: RC
authors.lastname: Silva
authors.forename: A C C
authors.initials: AC
authors.lastname: Zuanon
authors.forename: R R
authors.initials: RR
authors.lastname: Esberard
authors.forename: M S M
authors.initials: MS
authors.lastname: Candido
authors.forename: J S
authors.initials: JS
authors.lastname: Machado
mesh_terms: D003188:Composite Resins / Q000737:chemistry*; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006244:Hardness; D006245:Hardness Tests; D066298:In Vitro Techniques; D008420:Manufactured Materials; D013997:Time Factors
chemical_list: D003188:Composite Resins; D005899:Glass Ionomer Cements