Aim: This study aimed to asses and compare the fluoride releasing potential and recharging capacity of different bioactive restorative materials in-vitro
Materials and Methods: 50 freshly extracted premolar teeth was used. buccal class V cavities were prepared. Sample was randomly divided into 5 main groups (n = 10 /group), representing materials used; Conventional glass ionomer, resin modified glass ionomer, Compomer , Giomer; and ACTIVA Bioactive-Restorative. Fluoride releasing potential and recharging capacity were evaluated at 1st, 3rd,7th, 14th , 21st and 28th days.
Results: There was significant difference between each tested materials at all time intervals before and after recharging (p ≤ 0.001). The highest fluoride releasing potential and recharging capacity was in (Day-1), and the least value was in (Day-28). There was significant difference between the tested materials at each time interval regarding fluoride release before and after recharge.; Conventional glass ionomer showed the highest values of fluoride releasing potential and recharging capacity at each time interval (1st, 3rd,7th, 14th , 21st and 28th days.), while compomer showed the lowest values at each time interval.
Conclusion: The conventional glass ionomer showed the highest fluoride releasing potential and recharging capacity, while compomer showed the lowest fluoride releasing potential and recharging capacity at each time interval. ACTIVIA Bioactive-Restorative showed a lower fluoride releasing potential and fluoride recharging capacity than those of conventional glass ionomer, a higher values than those of both compomers and , resin modified glass ionomer and comparable to those of giomer at each time interval