At-home Whitening
The most popular method of whitening teeth is the at-home, dentist-supervised option. During your visit to the dentist, he or she takes a mold of your teeth and creates a comfortable, customized mouthtray. The mouthtray holds a mild solution whose main ingredient is carbamide peroxide, a substance that reacts with water to release a nontoxic bleaching element (hydrogen peroxide). The mouthtray is placed inside the mouth, and sits only against the teeth, thereby avoiding contact with the gums. Patients can choose either to wear the mouthtray throughout the night or for stretches that last from two to four hours. When the mouthtray is worn throughout the night, the treatment lasts one to two weeks. Patients with more sensitive teeth may opt for the latter approach, which lasts three to five weeks.