A Bioactive Enamel Sealer Can Protect Enamel during Orthodontic Treatment: An In Vitro Study

Background: This study aimed to evaluate the effectiveness of an experimental bioactive enamel resin sealer in protecting adjacent orthodontic brackets against erosion. Methods: Orthodontic (n = 50) were bonded freshly extracted, sound maxillary premolars using Transbond™ XT Primer (3M Unitek, Monrovia, CA, USA) and Transbond Plus Color Change adhesive USA). Five groups 10) had following treatments applied: a with 45S5 bioglass, 35% by weight; without glass; fluoride; sealer, Opal Seal (Opal-Orthodontics, South Jordan, UT, USA); and, control group, untreated surface. All specimens stored for 18 min 1% citric acid. examined SEM electron dispersive spectroscopy (EDS). The Wilcoxon signed-rank test was used compare surfaces covered sealers before after acid challenge. Attenuated total reflectance Fourier transform infrared detected degree resins’ conversion verify their suitability clinical use. Results: percentage groups’ protection erosion 100%, which significantly more than other groups, p < 0.05. unfilled resins 42.4% ± 3.6% 48.57% 5%, respectively. Conclusion: both protected from