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Future Dental Journal of Egypt

Abstract

Aim: To investigate the fluoride release and recharge from two fluoride releasing materials at different time intervals. Materials and methods: Sixty specimens were prepared then equally divided into 12 groups (n = 5/group), representing materials used; one resin modified glass ionomer restoration (RMGI); Fuji II LC and one enhanced RMGI; ACTIVA Bioactive-Restorative. Each material was evaluated for its fluoride release before and after fluoride recharge using a topical fluoride recharging gel at 1, 2, 7, 14, 21 and 28 days. Results: There was a statistical significant difference between different tested time intervals regarding fluoride release before and after fluoride recharge for both tested materials, where (p ≤ 0.001). The highest mean value of fluoride release was in (Day-1), and the least mean value of fluoride release was in (Day-28). There was no statistical significant difference between both materials at each time interval regarding fluoride release before recharge. While after fluoride recharge; RMGI (Fuji II LC) showed higher fluoride release mean values compared to the enhanced RMGI (ACTIVA) at each time interval (1, 2, 7, 14, 21, 28 days). Conclusion: RMGI and enhanced RMGI, showed the same pattern of fluoride release in deionized water, but RMGI was more successful to be recharged.

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