As the whitening gel acts upon the stains, it oxidizes them to a white color. Crowns, bridges, bonding and fillings do not lighten.
A dwarf dab of whitening gel in the frontal portion of the trays for each exposed tooth when smiling (no need to whiten unexposed teeth) and trimming the thermoforming trays at the gingival line (where teeth and gum come together) with immature scissors teeth whitening product will government any waste and anticipate exposing soft tissue to the process.
