Teeth whitening treatment refers to various procedures and products aimed at brightening and lightening the color of teeth. It is a popular cosmetic dental procedure that can improve the appearance of stained or discolored teeth. This is a professional teeth whitening procedure performed by a dentist. It involves the application of a bleaching agent, usually containing hydrogen peroxide or carbamide peroxide, directly onto the teeth. The dentist may use a special light or laser to activate the bleaching agent and enhance its effectiveness. In-office teeth whitening typically provides immediate results, and the procedure can be completed in a single visit or a few sessions. These kits are available over the counter or can be provided by a dentist. They usually include custom-fitted trays and a whitening gel. The patient fills the trays with the gel and wears them over the teeth for a specified period, usually a few hours per day or overnight. At-home whitening kits may take several days or weeks to achieve the desired results, depending on the concentration of the whitening agent. Whitening strips are thin, flexible plastic strips coated with a whitening gel containing peroxide. They are applied directly to the teeth and left in place for a specified amount of time. The peroxide in the gel helps remove surface stains and lighten the teeth. Whitening strips are available over the counter and are relatively easy to use, but they may not be as effective as professional treatments.