Initial Mechanical Stabilization of Conventional Glass Ionomer Cements with Different Active Principles

Objective: To determine the initial mechanical stabilization of conventional glass ionomer cements (GICs) indicated for atraumatic restorative treatment (ART) in different storage periods. Material and Methods: Specimens were divided according to GIC (n=12): IZ - Ion-Z, KM Ketac Molar Easymix, RS Riva Self Cure, GL Gold Label 9. They prepared stored distilled water. Superficial microhardness (SMH) was evaluated (KHN) three phases: (A) after 1, (B) 3, (C) 7 days storage. Data submitted 2-way ANOVA Tukey tests (α = 5%). Results: The average KHN values phases A, B, C were, respectively, 33.05 ± 9.74; 33.21 10.31 52.07 11.75 (IZ); 50.35 11.39; 66.05 10.48 67.77 13.80 (KM); 89.63 15.59; 71.31 23.86 57.70 16.89 (RS); 42.18 9.03; 68.54 6.83 57.95 8.24 (GL). Significant differences observed: GIC, time, interaction both (p<0.05). differed between groups, except parameter GL. time phase A lower than those B C, RS. Conclusion: types tested final period, all had similar SMH.