Abstract
ObjectiveTo evaluate the influence of the surface used for manipulation (paper block and glass slab) on the mechanical properties (flexural strength and elastic modulus) and ion release (F−) of two resin modified glass ionomer cements (RMGIC). MethodsTwo RMGICs: Vitro Fil LC (DFL) and Riva Light (SDI) were used. The materials were manipulated on two different surfaces: block of paper and glass slab. A 3-point-bending test (Instron 3342) was used to obtain the modulus of elasticity (GPa) and flexural strength (MPa). To measure fluoride release (ppm), cylindrical test specimens were fabricated. The data were submitted to two-way ANOVA and Holm–Sidak test for the contrast among means (α=0.05). ResultsThe surface used for manipulation had no influence on the flexural strength and modulus of elasticity of the RMGICs (p>0.05). Manipulation on the glass plate considerably reduced fluoride release for all the RMGICs tested (p<0.001). ConclusionsAccording to the results of this study, RMGICs must not be manipulated on glass slabs, because there was a reduction in fluoride release.
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