Abstract: A tooth whitening apparatus and method using an intra-oral light generating device, whereas the light generating device is placed inside a patient's mouth and bucally to the jaws to produce a light source, comprises the steps of applying inside a means for depositing and applying, adapted for the upper and lower jaws, a tooth whitening agent comprising an optical chemical agent. Said means for depositing and applying are made of suitable material comprising plastic, and adapted inside the patient's mouth and adjacent to the inner surface of the patient's lips.

Abstract: An embodiment of the present invention is a technique for dental bleaching. A tray covers teeth of a user and has a reservoir. A conductor is placed inside the tray. The conductor is covered by a bleaching agent when the bleaching agent fills the reservoir. The conductor is electrically connected to a negative terminal of a power source to cause regeneration of free radicals decomposed from the bleaching agent when power is applied.