title: Fluoride release and uptake from glass ionomer cements and composite resins.
abstract: The aim of this investigation was to evaluate fluoride release and uptake from 4 glass ionomer cements (GICs)--Vitremer (VIT), Fuji II LC (FII LC), Fuji IX (FIX), Chelon Fill (CHE)--and 2 composite resins (CRs)--Heliomolar (H) and Zeta-100 (Z-100). Eight discs (8 mm x 2 mm) were made of each material and were stored in plastic vials containing artificial saliva at 37 degrees C. In group 1 (N = 3), the specimens were immersed in artificial saliva which was changed daily for 25 days. In group 2 (N = 5), besides receiving the same treatment as group 1, the specimens were immersed, after 24 hours, in a fluoride solution (1% NaF) for 1 min before daily saliva change. An ion-specific electrode (9609 BN-Orion) connected to an ion analyzer (SA-720 Procyon) was used to determine the amount of fluoride released at days 1, 2, 5, 10, 15, 20 and 25. Data were analyzed using two way ANOVA and Friedman's test. GICs released more fluoride during the first day and after this period the mean fluoride released decreased. Composite resin H released fluoride during the first day only and Z-100 did not release fluoride. In terms of NaF treatment, CRs did not show fluoride uptake, whereas the GICs showed fluoride uptake (VIT = FII LC = CHE > FIX).
authors.affiliation: Departamento de Odontologia Preventiva e Social, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil.
authors.forename: P
authors.initials: P
authors.lastname: Weidlich
authors.forename: L A
authors.initials: LA
authors.lastname: Miranda
authors.forename: M
authors.initials: M
authors.lastname: Maltz
authors.forename: S M
authors.initials: SM
authors.lastname: Samuel
mesh_terms: D000042:Absorption; D000180:Acrylic Resins / Q000737:chemistry; D000704:Analysis of Variance; D002327:Cariostatic Agents / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry*; D004058:Diffusion; D005459:Fluorides / Q000737:chemistry*; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D017736:Ion-Selective Electrodes; D011140:Polyurethanes / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry; D012117:Resins, Synthetic / Q000737:chemistry; D012464:Saliva, Artificial / Q000737:chemistry; D012822:Silicon Dioxide; D012969:Sodium Fluoride / Q000737:chemistry; D013223:Statistics as Topic; D013997:Time Factors; D015040:Zirconium
chemical_list: D000180:Acrylic Resins; D002327:Cariostatic Agents; C029012:Composite Dental Resin; D003188:Composite Resins; C079765:Fuji II LC cement; D005899:Glass Ionomer Cements; C513708:Heliomolar; D011140:Polyurethanes; D019279:Resin Cements; D012117:Resins, Synthetic; D012464:Saliva, Artificial; C084550:Vitremer; C083568:Z100 composite resin; C110713:fuji IX; C068076:Chelon Fil; D012822:Silicon Dioxide; D012969:Sodium Fluoride; D015040:Zirconium; D005459:Fluorides