From Hatrick, Eakle, and Bird, 2011.
1. Extrude block-out resin material onto facial and buccal surfaces of teeth to be whitened, ensuring material is evenly distributed.
2. Place pea-size amount of whitening gel on the inside of each custom whitening tray toward facial and buccal aspect of each tooth being bleached.
7. Rinse twice with water to remove any remaining gel, being sure to expectorate the water; do not swallow.