Bleaching trays are plastic retainers made using models of your teeth that hold whitening gel. Each tray is custom-made to fit over the user’s upper and lower teeth “like a glove.” To perform treatments, the user places whitening gel in the teeth whitening trays and then seats them over their teeth according to the whitening gel manufacturer’s instructions.
Cavity
Cavities are permanently damaged areas in the hard surface of your teeth that develop into tiny holes. Cavities, also called tooth decay, are caused by bacteria in your mouth, frequent snacking, sipping sugary drinks, and not cleaning your teeth well.