Assessment of fluoride release and recharge ability from some esthetic restorative materials exposed to two types of fluoridated dental materials (In Vitro Comparative Study)

Shilan Nawzad Dawood; Salam D. Al–Qaisi; Miwan Salahalddin A.Alrahman

Volume : IV, Issue : X, October - 2015

Assessment of fluoride release and recharge ability from some esthetic restorative materials exposed to two types of fluoridated dental materials (In Vitro Comparative Study)

Shilan Nawzad Dawood, Salam D. Al Qaisi, Miwan Salahalddin A. Alrahman

Abstract :

Aim: The aim of this study was to investigate the fluoride release and fluoride recharge behaviors of two glass ionomer cements ( Fuji IX GP, GC Corp.; Ketac N100, 3M ESPE ) and a composite resins(Gradia Direct X, GC Corp) before and after exposure to mouthwash and toothpaste in which a fluoride ion–selective electrode was used to measure fluoride concentrations. Materials and Methods: Ninety standardized discs of the studied materials were faicated with dimension of (8 mm diameter and 2 mm thickness) from cylindrical ass moulds suspended in 8ml polyethelene vial. Fluoride released from the materials was measured at 1st, 2nd, 7th 14th and 30th days. At 30th day the specimens were divided into three groups. Specimens in the control group were stored in deionized water. For the other two groups, the specimens were exposed fluoridated toothpaste and fluoridated mouthwash. After refluoridation, fluoride amount was measured at 32th, 39th, 46th, and 53th days. Results: The release of fluoride was highest on day 1 (90.097) for Fuji IX and (64.819) for Ketac N then there was a sudden fall on day 2 and gradual constant decrease over time, the lowest value is in the thirty days which is (18.186)for Fuji IX, (10.711) for Ketac . While Gradia X shows lower release and leveling off thereafter without any sudden release or decrease in which the fluoride ion released at constant low level. After treatment solutions, there is no effect of fluoride recharge ability by de ionized water but there is a significant increase in fluoride release after treatment with toothpaste and mouthwash, in 32Th day which is (36.654) for Fuji IX, (26.768) for Ketac N and (4.160) for Gradia X but the mean value dropped to a constant, low level at 39th and 46th days,at day 53th when reflouridation is administered on daily basis the rate of fluoride ion release increased significantly Conclusions: The three fluoride–containing dental materials used were able to release fluoride and exhibited different fluoride release patterns depending on their compositions. After exposure to fluoridated mouthwash and toothpaste, all materials were recharged and continued releasing fluoride, in which recharge ability from the toothpaste group was found to be more successful than the mouthwash group.