title: Fluoride uptake by enamel and dentin from bonding agents and composite resins: a comparative study.
abstract: The present study was performed to compare the amount of in vitro fluoride uptake by enamel and dentin from fluoridated bonding agent with non-fluoridated composite (Group I), non-fluoridated bonding agent with fluoridated composite (Group II) and fluoridated bonding agent with fluoridated composite resin (Group III). Sixty extracted premolars were selected and divided into three groups of 20 teeth each. Restorative materials were applied according to manufacturer's instructions into standard windows created in the teeth, cured and placed in de-ionised water for three months. The fluoride content of successive acid etch biopsy was determined by specific ion-electrode analysis. Although significant amount of fluoride uptake occurred in all the test groups, fluoride uptake was found to be highly significant in dentin when compared to enamel in Group, I, II and III (P<0.001). The fluoride uptake was greater by both enamel and dentin in Group III ie fluoridated bonding agent with fluoridated composite resin.
authors.affiliation: Department of Pedodontics and Preventive Dentistry, College of Dental Sciences, Davangere-577 004, Karnataka.
authors.forename: N D
authors.initials: ND
authors.lastname: Shashikiran
authors.forename: N C
authors.initials: NC
authors.lastname: Kumar
authors.forename: V V
authors.initials: VV
authors.lastname: Subba Reddy
mesh_terms: D000134:Acid Etching, Dental; D000180:Acrylic Resins / Q000737:chemistry; D000704:Analysis of Variance; D002327:Cariostatic Agents / Q000737:chemistry / Q000493:pharmacokinetics*; D003188:Composite Resins / Q000737:chemistry*; D003743:Dental Enamel / Q000378:metabolism*; D003804:Dentin / Q000378:metabolism*; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D005459:Fluorides / Q000737:chemistry / Q000493:pharmacokinetics*; D006801:Humans; D017736:Ion-Selective Electrodes; D008689:Methacrylates / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D011140:Polyurethanes / Q000737:chemistry; D018709:Statistics, Nonparametric; D013997:Time Factors
chemical_list: D000180:Acrylic Resins; D002327:Cariostatic Agents; C029012:Composite Dental Resin; D003188:Composite Resins; D017220:Dentin-Bonding Agents; C420130:Excite cement; D008689:Methacrylates; D011109:Polymethacrylic Acids; D011140:Polyurethanes; C425843:Prime and Bond NT; C420128:Spectrum composite resin; D005459:Fluorides