Evaluation of fluoride release from three different Glass-ionomer luting cements at different time intervals

ARTICLE INFO Background and Aim: The €uoride released in oral cavity plays an effective role in preventing carries in lateral walls of the restoration cavities and remineralization of initial lesions. Dental materials are considerably different regarding the amount of €uoride release. This study aimed to determine the amount of €uoride release from three self-cure glass ionomer cements, Fuji I, Fuji Plus and SDS in distilled water. Materials and Methods:In this experimental study, 8 disc-shape specimens (310mm) were prepared from three glass ionomers, Fuji I and Fuji Plus (CG, Japan) and SDS (Iran). Eight specimens of each material were placed in 7ml of distilled wa- ter and were stores in incubator at 37oC. The amount of €uoride release was measure at 1, 3, 7, 14, 28 and 56 days using a €uoride ion-speci‚c electrode (Metrohm, Swit- zerland). Data were analyzed using repeated measurement ANOVA and LSD tests. Results: The pattern of €uoride release was similar for the three materials. The amount of released €uoride from the three material in day 1 was considerably greater than the other days (Fuji I=28.07ƒ0.26, Fuji Plus=35.97ƒ0.19, SDS=41.08ƒ0.36), followed by a gradual decrease over the study period. The least amount of €uoride release was recorded on day 56. The difference between the amount of €uoride release from the three glass ionomers was statistically signi‚cant (P=0.0001). Conclusion: In addition to revealing a statistically signi‚cant difference between the three glass ionomers in terms of €uoride release, the results of this study suggests using SDS glass ionomer in patients susceptible to caries.