After the treatment period, the gel is wiped off the teeth. The patient must then rinse his or her mouth out with water. Usually, the patient will be given some products to use at home to further polish his or her teeth, such as teeth whitening toothpaste or a whitening gel with trays; if trays were used during the procedure, they might be sent home with the patient to use with the at-home gel.
Sensitivity can occur, such as when one eats cold or hot food or drink. Even luke-warm water might feel cold against the teeth and gums after the procedure. Typically, this sensitivity will be gone within forty eight hours. Sometimes, however, the patient will experience permanent sensitivity, which is caused from excessive damage. However, technology has improved, and the amount of time needed to damage the teeth is usually longer than the procedure takes, so the risk of permanent damage is very small. Still, though, there is a risk.