title: Evaluation of a new 2-paste glass ionomer cement.
abstract: A new 2-paste resin-reinforced glass ionomer cement, Fuji Ortho Band Paste Pak (GC Corporation, Tokyo, Japan), for the placement of orthodontic bands, has been developed for easier handling. The aim of this study was to compare the fluoride release and uptake characteristics of this cement with that of 3 others commonly used to cement orthodontic bands: a conventional resin-reinforced glass ionomer cement, a polyacid-modified composite resin, and a conventional glass ionomer cement. Fluoride release was measured during a 28-day period. After the measurement on day 28, experimental samples were exposed to 1000 ppm sodium fluoride solution for 5 minutes, and fluoride release was then measured for 7 days. Initially, the new 2-paste resin-reinforced glass ionomer cement released the greatest amount of fluoride; the polyacid-modified composite resin released the least initially, and it continued to show the lowest values throughout the study. The fluoride uptake and release values of the new 2-paste resin-reinforced glass ionomer cement were statistically significantly higher than those of the conventional resin-reinforced glass ionomer cement or the conventional glass ionomer cement. The new 2-paste resin-reinforced glass ionomer cement might be a good alternative to conventional products for cementing orthodontic bands.
authors.affiliation: Department of Orthodontics, Nippon Dental University, Tokyo, Japan. komo@msi.biglobe.ne.jp
authors.forename: Akira
authors.initials: A
authors.lastname: Komori
authors.forename: Iori
authors.initials: I
authors.lastname: Kojima
mesh_terms: D000042:Absorption; D000180:Acrylic Resins / Q000737:chemistry; D000538:Aluminum Silicates / Q000737:chemistry; D000704:Analysis of Variance; D002327:Cariostatic Agents / Q000737:chemistry*; D020770:Compomers / Q000737:chemistry; D004058:Diffusion; D005459:Fluorides / Q000737:chemistry*; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D016555:Matched-Pair Analysis; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D009824:Ointments; D016910:Orthodontic Brackets; D019279:Resin Cements / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry; D012969:Sodium Fluoride / Q000737:chemistry; D013997:Time Factors
chemical_list: D000180:Acrylic Resins; D000538:Aluminum Silicates; D002327:Cariostatic Agents; D020770:Compomers; D005899:Glass Ionomer Cements; D008689:Methacrylates; D009824:Ointments; D019279:Resin Cements; C006903:carbopol 940; C005044:hydroxyethyl methacrylate; D012822:Silicon Dioxide; D012969:Sodium Fluoride; D005459:Fluorides