Bioactive Orthodontic Enamel Sealer is Capable of Remineralizing and Protecting Enamel

Objectives: Many patients seeking orthodontic treatment suffer from enamel demineralization which may alter the orthodontic treatment plan due to the difficulty of treating such lesions before bonding orthodontic brackets to the demineralized enamel surfaces. Opalseal (Os) is an Orthodontic sealer capable of releasing fluoride to enamel. Biomin is a bioactive remineralizing agent.
This study aimed at comparing the remineralization testing the bioactive glass as a sealer capable of remineralizing white spot lesions prior to bonding orthodontic brackets and as protective agent for enamel surrounding the enamel brackets.
Methods: Freshly extracted premolars (150) were challenged by a demineralization solution for 4 days. The teeth were subsequently divided into 3 groups: Bioactive glass group (Bg), Opalseal group (Os) and control group(Cont). Transbond XT plus adhesive was used to bond orthodontic brackets to the treated enamel specimens. Transmicroradiography (TMR) was used to determine the remineralization capacity of the utilized agents to remineralize the demineralized enamel specimens, the results were compared using One way ANOVA. For testing the protective effect of the tested agents for the enamel surrounding the orthodontic brackets the bonded specimens were immersed in 1 % citric for 18 minutes and the specimens were observed by scanning electron microscope equipped with energy-dispersive x-ray spectroscopy (SEM-EDS); Wilcoxon Signed-Rank test was used to compare the area covered by the different utilized agents before/after erosion p<0.05.
Results: Treatment with Biomin paste resulted in the formation of an interaction layer that significantly remineralized the enamel surface prior to bonding orthodontic brackets when compaired to the other two group <0.05. Both Biomin and opalseal exerted a protective effect for enamel against erosive challenge p<0.05.
Conclusions: Biomin paste can efficiently remineralize enamel prior to bonding orthodontic brackets and can protect the enamel surfaces next to orthodontic brackets.