Table 1: Details of the brand, composition and mode of application according to the manufacturer.

Material Brand Composition Mode of Application
Opalescence® Boost (HP40%) (Ultradent Products Inc, South Jordan, US) 40% hydrogen peroxide, chemical activator, 1.1% fluoride, 3% potassium nitrate. In-office bleaching agent. Three applications of 20 minutes. Remove it with a soft pellet; rinse twice with copious water. Repeat the procedure in 2 other applications with 3-day interval between each one.
Opalescence® 10% (CP10%) (Ultradent Products Inc, South Jordan, US) 10% carbamide peroxide, Carbopol, glycerin, flavoring. ​To the patient: Express one continuous bead of gel approximately halfway up the facial side of your tray. Place the tray over your teeth and gently press. Wear for 8-10 hours, or overnight. After whitening, remove the tray and use a soft toothbrush, or your finger, to clean any excess gel off your teeth.
Opalescence® 15% (CP15%) (Ultradent Products Inc, South Jordan, US) 15% carbamide peroxide, Carbopol, glycerin, flavoring. To the patient: Express one continuous bead of gel approximately halfway up the facial side of your tray. Place the tray over your teeth and gently press. Wear for 6-8 hours. After whitening, remove the tray and use a soft toothbrush, or your finger, to clean any excess gel off your teeth.
Opalescence® 20% (CP20%) (Ultradent Products Inc, South Jordan, US) 20% carbamide peroxide, Carbopol, glycerin, flavoring. To the patient: Express one continuous bead of gel approximately halfway up the facial side of your tray. Place the tray over your teeth and gently press. Wear for 2-4 hours. After whitening, remove the tray and use a soft toothbrush, or your finger, to clean any excess gel off your teeth.
Opalescence® TresWhite Supreme (HP10%) (Ultradent Products Inc, South Jordan, US) 10% Hydrogen peroxide, glycerin, flavoring Remove the tray and align it correctly over your teeth. Gently suck on the tray to create suction, so that the tray will adhere to your teeth. Detach the external part of the tray. Tap gently on the remaining part of the tray to ensure that it is securely attached to your teeth. Leave it in place for 30 to 60 minutes. Remove the tray from your mouth and cleanse your teeth of the excess gel by brushing as necessary.