title: Fluoride release/uptake from different orthodontic adhesives: a 30-month longitudinal study.
abstract: The aim of this study was to test the null hypothesis that there is no difference in fluoride release between resin-modified glass ionomer cements (RMGICs) and composites in the long term. The materials were divided into 5 groups: a nonfluoride-releasing composite - Group TXT (Transbond XT), a fluoride-releasing composite - Group QC (Quick-Cure), and three RMGICs - Groups FOLC, FOB and MC (Fuji Ortho LC, Fuji Ortho Band, and Multi-Cure). Fluoride release was measured at time intervals of 1 h, 1, 7, 14, 21 and 29 days, followed by further evaluations performed at 6, 12, 18, 24 and 30 months using selective ion electrodes connected to an ionic analyzer. Fluoride releasing and re-releasing experiments were analyzed using the Kruskal-Wallis test and Mann-Whitney test with the Bonferroni correction. The amount of fluoride released by FOB was larger in comparison with the other adhesives (p=0.01). In the long-term, FOLC and MC had a similar performance (p>0.05). The composites presented a low fluoride release, but fluoride ion uptake and re-release capacity of QC was statistically significant (p<0.05) during the experiment. In conclusion, the null hypothesis was rejected, the RMGIC Fuji Ortho Band and the composite Quick-Cure presented greater fluoride release and re-release capacity when recharged.
authors.affiliation: Department of Orthodontics and Pediatric Dentistry, UFCG - Federal University of Campina Grande, PatosPB, Brazil.
authors.forename: Rogério Lacerda dos
authors.initials: RL
authors.lastname: Santos
authors.forename: Matheus Melo
authors.initials: MM
authors.lastname: Pithon
authors.forename: Aline Birra Nolasco
authors.initials: AB
authors.lastname: Fernandes
authors.forename: Fabiola Galbiatti
authors.initials: FG
authors.lastname: Carvalho
authors.forename: Alessandro Leite
authors.initials: AL
authors.lastname: Cavalcanti
authors.forename: Delmo Santiago
authors.initials: DS
authors.lastname: Vaitsman
mesh_terms: D003738:Dental Cements / Q000737:chemistry*; D005459:Fluorides / Q000737:chemistry*; D006801:Humans; D008137:Longitudinal Studies
chemical_list: D003738:Dental Cements; D005459:Fluorides