Long-term fluoride release from resin-reinforced orthodontic cements following recharge with fluoride solution.
The aim of this study was to test the hypothesis that there is no difference in the fluoride release behavior of resin-reinforced glass ionomer cements before or after fluoride recharge. The materials were divided into 5 groups: 2 resin-reinforced glass ionomer cements used for attaching orthodontic bands, that is, group FOB (Fuji Ortho Band) and group MCB (Multi-Cure Glass Ionomer Orthodontic Band Cement); 2 resin-reinforced glass ionomer cements and a composite used for bonding orthodontic brackets, that is, group OGLC (Ortho Glass LC), group FOLC (Fuji Ortho LC), and group TXT (Transbond XT), respectively. Fluoride release was measured during a 60-day period by using selective ion electrodes connected to an ionic analyser. After 4 weeks, the samples were exposed to 0.221% sodium fluoride solution. The results showed that cements achieved a maximum fluoride release 24 h after initial setting. No statistically significant differences were observed between groups FOB and OGLC regarding the amount of released fluoride following fluoride recharge from day 31 to day 36 (p>0.05). In conclusion, FOB and OGLC cements showed a higher capacity of capturing and releasing fluoride compared to the other cements studied.
dos Santos
Rogério Lacerda
RL
Departament of Orthodontics, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
Pithon
Matheus Melo
MM
Vaitsman
Delmo Santiago
DS
Araújo
Mônica Tirre de Souza
MT
de Souza
Margareth Maria Gomes
MM
Nojima
Matilde Gonçalves da Cunha
MG
D000180:Acrylic Resins / Q000737:chemistry; D000538:Aluminum Silicates / Q000737:chemistry; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D002327:Cariostatic Agents / Q000008:administration & dosage / Q000032:analysis*; D001840:Dental Bonding; D004058:Diffusion; D004337:Drug Carriers; D005460:Fluorides, Topical / Q000008:administration & dosage / Q000032:analysis*; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D008137:Longitudinal Studies; D008422:Materials Testing; D016910:Orthodontic Brackets; D019279:Resin Cements / Q000737:chemistry*
D000180:Acrylic Resins; D000538:Aluminum Silicates; D002327:Cariostatic Agents; D004337:Drug Carriers; D005460:Fluorides, Topical; C112133:Fuji Ortho; D005899:Glass Ionomer Cements; C516145:Multicure cement; D019279:Resin Cements; C065742:Transbond; D017438:Bisphenol A-Glycidyl Methacrylate