Abstract: Daily fluoride release/uptake by glass ionomer cements, compomers and Giomers. To measure the amounts of fluoride released from fluoride-containing materials before and after fluoride applications 4 glass ionomer cements (Fuji IX, Fuji VII, Fuji IX Extra, Fuji II LC), a Compomer (Dyract Extra) and a Giomer (Beautifil) were used in this study. Cylindrical specimens prepared and the amount of released fluoride was measured during the 1st week and on the days 14 and 21 by using specific fluoride electrode and an ion-analyzer. After 21 days, the specimens divided into 1 groups each of 10. The specimens of 1 group exposed to 220 ppm Mouth wash solution and the other group specimens exposed to 1000 ppm F NaF toothpaste. Fluoride release after recharge was measured and recorded daily for a total of 7 days. The results were statistically analyzed using 2 ways ANOV A and Tukey Kramer multiple comparison tests. Significant differences were seen in fluoride release before and after recharge for different days and materials. FVII released the maximum amount of fluoride followed by FIX EX, FII LC, FIX, DE and BT. On the 21st the maximum fluoride release was related to FVII, followed by FII LC, FIX EX, FIX, DE and BT. The maximum and minimum fluoride in samples treated by mouthwash or toothpaste released by FVII and BT, respectively. The maximum amount of fluoride released by F VII and the minimum by BT before and after recharge, respectively. It seems that the extent of the glass ionomer matrix plays an important part in determining the fluoride recharging ability of GICs materials.