title: Fluoride release and neutralizing effect by resin-based materials.
abstract: This study evaluated the fluoride-releasing and neutralizing abilities of resin-based materials containing fluoride in water and aqueous lactic acid. Two composites, containing a low-solubility fluoride component (Heliomolar) and a fluoroalumino-silicate glass (UniFil S), and two giomers, containing surface reaction type prereacted glass-ionomer filler (Beautifil) and full reaction type glass-ionomer filler (Reactmer paste), were used. Resin-modified glass-ionomer cement (Fuji II LC) was used as a control. The fluoride release and pH value in storage medium, after immersion in each material, was measured for 10 weeks. For UniFil S and Beautifil, the amount of fluoride released in acid solution markedly increased compared to storage in water (p<0.05). Although all materials, except Heliomolar, neutralized the storage media, the neutralizing ability of these resin-based materials in acid solution sharply decreased with aging of the specimens, except for Fuji II LC. These results suggest that the nature of fluoride incorporated into resin-based materials affect the fluoride-releasing and neutralizing ability of materials in water and aqueous lactic acid.
authors.affiliation: Dental Materials Science Unit, School of Dental Sciences, University of Newcastle upon Tyne, Newcastle upon Tyne, United Kingdom. itota@md.okayama-u.ac.jp
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Itota
authors.forename: Omar T
authors.initials: OT
authors.lastname: Al-Naimi
authors.forename: Thomas E
authors.initials: TE
authors.lastname: Carrick
authors.forename: Masahiro
authors.initials: M
authors.lastname: Yoshiyama
authors.forename: John F
authors.initials: JF
authors.lastname: McCabe
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D002327:Cariostatic Agents / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry*; D005459:Fluorides / Q000737:chemistry*; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007101:Immersion; D019344:Lactic Acid / Q000737:chemistry; D008422:Materials Testing; D011140:Polyurethanes / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry; D012117:Resins, Synthetic / Q000737:chemistry; D013997:Time Factors; D014867:Water / Q000737:chemistry
chemical_list: D000180:Acrylic Resins; C470433:Beautifil composite resin; 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; C483424:Unifil S; C465006:reactmer paste; D014867:Water; D019344:Lactic Acid; D017438:Bisphenol A-Glycidyl Methacrylate; D005459:Fluorides