Figure 4. GKetac and GFuji fluoride release (0%, 0.5%, 1%, 2%, and 5%) after 24 hours, and 7, 14, 21, and 28 days.
Different capital letters indicate statistically significant differences within the groups (considering the different time points and the different concentrations of the same glass ionomer cement [GIC]); different small letters indicate statistically significant differences between the groups (considering the same time points and graphene concentration between GKetac and GFuji); and different numbers indicate significant differences when comparing the same materials in the different time points (considering the periods of release in the same GIC and graphene concentration).