Portal de Periódicos da CAPES

Evaluation of Fluoride Release, pH and Microhardness of Glass Ionomer Cements

2015; SciELO; Volume: 15; Linguagem: Inglês

10.4034/pboci.2015.151.03

1983-4632

Andréia Medeiros Rodrigues Cardoso, Arlley de Sousa Leitão, José Cordeiro Lima Neto, Tomás Lúcio Marques de Tomás Lúcio Marques de, Dened Myller Barros Lima, Lorenna Mendes Temóteo Brandt, Ricardo Dias de Castro, Alessandro Leite Cavalcanti,

Anatomy and Medical Technology

Objective: To evaluate fluoride release, pH and microhardness of glass ionomer cements (GIC). Material and Methods: Four different cements: Vidrion ® R (G1), Vitro Fil ® (G2), Maxxion ® (G3) and Magic Glass ® (G4) and a composite resin (G5 - control group) comprised the sample. Thirty specimens were manufactured (10 mm x 3 mm) and stored in deionized water. Analyses were performed after 24 hours, 7 days and 28 days. The following devices were used for measurements: fluorometer, pH meter and microhardness tester. Data were analyzed by Kruskal-Wallis, Mann-Whitney, Friedman and Wilcoxon tests (α = 0.05) using the SPSS ® software (Statistical Package for Social Sciences) version 17. Results: GICs were able to release fluoride; however, the amount released decreased with increasing immersion time (p <0.002). The pH of all products increased over time, the lowest value was identified for Magic Glass (5.93) and the highest for Maxxion (6.94) at time of 24 h. Materials showed significant decrease in surface microhardness, especially G4 for presenting the lowest recorded values (p <0.05). Conclusion: GICs are fluoride-releasing restorative materials with pH favorable to oral homeostasis and good mechanical behavior.