During the dental bleaching process, a bleaching agent, typically containing hydrogen peroxide or carbamide peroxide, is applied to the teeth. This bleaching agent penetrates the enamel of the teeth and breaks down the stains and discoloration molecules, resulting in a lighter appearance.

Dental bleaching can be performed in-office by a dentist or at home using customized trays and bleaching gel provided by the dentist. In-office bleaching procedures often involve the use of a higher concentration of bleaching agent and may be completed in a single visit, while at-home bleaching typically requires multiple sessions over a period of several weeks.

Overall, dental bleaching is a safe and effective way to improve the appearance of discolored or stained teeth, helping individuals achieve a whiter, more youthful smile. However, it's essential to consult with a dentist before undergoing any teeth whitening treatment to ensure it is appropriate for your oral health needs and to discuss the best approach for achieving your desired results.