title: Determination of fluoride release from light-cured glass-ionomers and a fluoridated composite resin from the viewpoint of curing time.
abstract: The purpose of this study was to investigate the fluoride releasing pattern of several visible light-curing glass-ionomers and one fluoride-containing filling material, from the viewpoint of curing time. Standardized blocks of Time Line (Caulk-USA), XR-Ionomer (Kerr-USA), Vitrebond (3M-USA) and Heliomolar-Ro (Vivadent-Lichtenstein) were light cured for 20, 40 and 60 s, and then stored in deionized distilled water at 37 degrees C for 24, 48, 72 h and 7 days. The water was changed every day and measurements of the fluoride released from the materials were made daily. The results were compared statistically with the results obtained from Ketac-Bond (Espe-Germany) prepared in the same manner. The levels were highest for the first 24 h; in the following days they decreased rapidly. The fluoride-releasing patterns of all these materials were similar to each other. The fluoride release was the highest from XR-Ionomer, and the lowest from Heliomolar-RO. For Time Line glass-ionomer, the fluoride release from 20 s cured blocks was significantly higher than the fluoride release from 40 and 60 s cured blocks at the end of 1 week. It was observed that the fluoride release from Ketac-Bond was significantly lower than XR-Ionomer and Vitre-Bond and higher than Time Line and Heliomolar-Ro.
authors.affiliation: Department of Conservative Dentistry, Faculty of Dentistry, University of Istanbul, Turkey.
authors.forename: H
authors.initials: H
authors.lastname: Ulukapi
authors.forename: Y
authors.initials: Y
authors.lastname: Benderli
authors.forename: M
authors.initials: M
authors.lastname: Soyman
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003188:Composite Resins / Q000737:chemistry*; D003764:Dental Materials / Q000737:chemistry; D005459:Fluorides / Q000032:analysis / Q000737:chemistry*; D005899:Glass Ionomer Cements / Q000737:chemistry*; D008027:Light; D008689:Methacrylates / Q000737:chemistry; D011140:Polyurethanes / Q000737:chemistry; D012969:Sodium Fluoride / Q000737:chemistry; D013997:Time Factors; D014520:Urethane / Q000031:analogs & derivatives / Q000737:chemistry; D014867:Water
chemical_list: D000180:Acrylic Resins; C029012:Composite Dental Resin; D003188:Composite Resins; D003764:Dental Materials; D005899:Glass Ionomer Cements; C513708:Heliomolar; D008689:Methacrylates; D011140:Polyurethanes; C069856:TimeLine; C513703:Vivadent; D014867:Water; C061499:Ketac-Bond; C067790:Vitrabond; C070604:XR Bond; D014520:Urethane; D012969:Sodium Fluoride; D005459:Fluorides