Evaluation of fluoride releasing and recharging of orthodontic adhesive resins: An in vitro study.
Background and objective: Development of white spot lesions to be a well-recognized and common side effect of orthodontic fixed appliance, in spite of vast improvement in preventive dental techniques and procedures. The aim of this study is to determine and compare amount of fluoride releasing and recharging of orthodontic adhesive resins.
Materials and methods: 12 specimens for fluoride releasing and recharging were used for each tested materials, materials tested for fluoride releasing were Transbond plus color change and Resilience (fluoridated ortho-adhesive resin). Fluoride releasing was estimated daily for 14 days, then weekly up to 28 days, then at day 42, 70 days. For fluoride recharging in addition to above materials Transbond XT (non-fluoridated ortho-adhesive resin) were used as a control group. The 12 specimens of each material were divided into two equal subgroups to simulate two different methods of fluoride application, namely, brushing with fluoride-containing toothpaste and after the topical application of fluoride gel. Fluoride releasing was measured at days 1,2,3,7 for gel application while for brushing group releasing of fluoride was measured at 7 days.
Results: Mann Whitney test, Kruskal Wallis test and Wilcoxon signed rank test were used for statistical analysis. During tested period all materials showed statically different capacity to release and uptake fluoride. Transbond plus color change was highest ability for fluoride releasing and recharging when compared to others materials.
Conclusion: Transbond plus color change and Resilience, showed fluoride release in distal de-ionized water. For fluoride recharging Transbond plus color change had more ability for re-charging than two other materials.
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