Teeth whitening is a popular cosmetic dental procedure aimed at enhancing the brightness of teeth and improving overall dental aesthetics. This process involves the use of bleaching agents, typically hydrogen peroxide or carbamide peroxide, to remove stains and discoloration from the enamel and dentin layers of the teeth. Stains can result from various factors such as consumption of certain foods and beverages (like coffee, tea, red wine), tobacco use, certain medications, and aging. Professional teeth whitening can be performed in a dental office, where higher concentrations of bleaching agents are used, providing more immediate and noticeable results.

One widely used in-office technique is laser whitening, which involves applying a bleaching gel to the teeth and then activating it with a laser light. This method can lighten teeth by several shades in just one session, typically lasting about an hour. At-home whitening kits, prescribed by dentists, offer a more gradual approach and include custom-fitted trays and lower concentration bleaching agents, to be used over several days or weeks. Over-the-counter products like whitening strips and toothpaste are also available, though they generally produce less dramatic results.

It's important to note that teeth whitening is not a one-size-fits-all solution and its effectiveness can vary based on the type of stains and the individual's dental health. People with sensitive teeth, gum disease, or dental restorations like crowns and veneers should consult with a dentist to determine the best approach for them. With proper care and maintenance, the results of teeth whitening can last from several months to a few years, although touch-up treatments may be necessary to maintain the desired level of whiteness.