OPALESCENCE 35% PF MINT REFILL KIT If you experience any significant sensitivity, stop your treatment and talk to your dentist.Opalescence is recommended for whitening discolored teeth prior to placement of composite, veneers, and/or crowns. It is effective in removing some or all internal tooth discolorations due to congenital, systemic, pharmacologic, traumatic, etc., factors as well as aging.Contains carbamide peroxide, potassium nitrate and fluoride.Express one continuous bead of gel approximately halfway up the facial side of the tray from molar to molar. This should use about 1/2 to 1/3 of a syringe per tray. Insert the tray in your mouth and lightly tap it to adapt the sides to your teeth. Wear time 30 minutes. Remove tray and use a finger or soft toothbrush to clean any excess gel off your teeth. Rinse your mouth twice being sure not to swallow rinsed gel.Sale items are limited to 2 per day per person. Product packaging is subject to change without notice and images of the product or product packaging online may differ from the actual product shipped. This product should only be used as directed by your dentist for tooth whitening with a custom fit or appropriate bleaching tray. We will not responsible for misuse of the product or negligence. If you have allergies to certain chemicals, please consult with your dentist before using this product.