Fig. 1: Shows orthodontic bracket bonded to a tooth and coated with Ortho-Coat after immersion in saline solution for two months

Fig. 2: Shows the tooth stained with 0.25% methylene blue after two-month immersion in saline solution

Fig. 3: Shows stained tooth after removal of coated bracket. Note lack of dye penetration under bracket. The white area shows the outline of the coating, not the bracket, which has a smaller footprint

Fig. 4: Shows underside of the stained bracket pad. Despite intense staining of the tooth and Ortho-Coat with methylene blue, there is no dye penetration or leakage beneath the bracket