Prevention of white spot lesion during orthodontic treatment: A novel bioactive glass nanobioadhesive

Abstract

Objectives: The objective of this study is to evaluate the ability of the bioactive glass (BAG)-Bonds to inhibit the demineralization surrounding the orthodontic brackets when being exposed to an in vitro caries challenge and also simultaneously evaluate the physical and mechanical properties in order to be accepted as an orthodontic bonding agent. Materials and Methods: Preparation of mesoporous bioactive glass (MBG) used an improved sol-gel method, combining with sacrificial liquid template to MBGs with controllable particle size. Tetraethyl orthosilicate, triethyl phosphate, calcium nitrate tetrahydrate, ethanol absolute, ethyl acetate, hexadecyltrimethylammonium bromide, deionized water, and ammonium hydroxide were used. The microstructure was analyzed using a field emission gun-based scanning electron microscope (SEM). The debonding and adhesion characteristics were analyzed using an Instron Universal Testing Machine. Results: SEM analysis shows that the prepared MBG particles possess spherical morphology with generally uniform size. Novel orthodontic bonding material (BG) provides adequate mechanical and physical properties in order to be accepted as an orthodontic bonding agent since its bond strength both at the time of bonding and after 6 months in simulated salivary conditions is significantly higher than conventional bonding resin (TBXT). The bond strength was also evaluated both initially at the time of bonding as well as 6 months after being kept in simulated salivary conditions. Conclusion: These novel adhesives result in reduced demineralization surrounding orthodontic brackets and possess optimal physical and mechanical properties to be accepted as an orthodontic adhesive.

Keywords

• bioactive glass
• demineralization
• nanobioadhesion
• orthodontic adhesive
• white spot lesions