title: Effect of curing method and storage condition on fluoride ion release from a fluoride-releasing resin cement.
abstract: The purpose of this study was to evaluate fluoride ion release from a resin-modified glass ionomer cement (Fuji IILC improved, FLC) and a fluoridated resin cement (Panavia F, PF) following different curing methods and storage conditions. The specimens, which were either light-cured (LC) or chemical-cured (CC), were stored in either distilled water (DW) or demineralizing solution (DS; pH 4.5) for 1, 3, 7, 15, 30, 60, and 90 days. Fluoride ion release was measured using a fluoride ion-specific electrode. Data (n = 5) were statistically analyzed using one- and three-way ANOVA (p = 0.05). A "burst effect" was observed in the first week from both materials. However, fluoride ion release from FLC was seven times higher than that from PF. Storage in demineralizing solution accelerated the amount of fluoride release from both materials. In addition, LC yielded a lower amount of fluoride ion release from both materials, as compared to CC. It was concluded that both curing mode and storage medium influenced the amount of fluoride release from the tested materials.
authors.affiliation: Cariology and Operative Dentistry, Department of Restorative Sciences, Graduate School, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8549, Japan. yoda.ope@tmd.ac.jp
authors.forename: Akira
authors.initials: A
authors.lastname: Yoda
authors.forename: Toru
authors.initials: T
authors.lastname: Nikaido
authors.forename: Masaomi
authors.initials: M
authors.lastname: Ikeda
authors.forename: Hidekazu
authors.initials: H
authors.lastname: Sonoda
authors.forename: Richard M
authors.initials: RM
authors.lastname: Foxton
authors.forename: Junji
authors.initials: J
authors.lastname: Tagami
mesh_terms: D000704:Analysis of Variance; D002327:Cariostatic Agents / Q000032:analysis*; D004356:Drug Storage; D005459:Fluorides / Q000032:analysis*; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006244:Hardness; D006863:Hydrogen-Ion Concentration; D017736:Ion-Selective Electrodes; D044367:Phase Transition; D019279:Resin Cements / Q000737:chemistry*; D012117:Resins, Synthetic / Q000737:chemistry*
chemical_list: D002327:Cariostatic Agents; C431351:Fuji II LC cement improved; D005899:Glass Ionomer Cements; C438843:Panavia-Fluoro; D019279:Resin Cements; D012117:Resins, Synthetic; D005459:Fluorides