->What is tooth whitening? Tooth whitening, also called bleaching, is a process of lightening and removing stains from a tooth. This process bleaches the enamel and dentin, the principal mass of a tooth, and brightens the discolored teeth. -> What are the different methods of teeth whitening? Some of the teeth whitening options are over-the-counter whitening systems; dentist dispensed at-home products, laser tooth whitening method; Loaded Tray Teeth Whitening method and in-office whitening methods. -> Are the whitening effects permanent? Whitening effects are never permanent. -> How do the teeth whitening kits work? The peroxide chemical is the main ingredient of every whitening product that bleaches the tooth enamel. About 10% carbamide peroxide are present in dentist dispensed products whereas 15 to 35 percent hydrogen peroxide is present in professionally applied tooth whitening products. When these products are used with laser, it speeds up the whitening process. -> Who are not recommended to undergo teeth whitening? Tooth whitening is not recommended for children below 16 and for lactating and pregnant women. Further, individuals with gum disease, worn enamel, cavities, and exposed roots should not undergo any tooth whitening procedure. ->How long does the methods of tooth whitening take? In-office procedures require two or more visits to the dentist and each visit lasts for thirty minutes to one hour. Whereas the at-home products purchased from a dentist or medical store and over-the-counter products take several hours to four weeks to show the result. -> What are the side effects of tooth whitening? Some feel temporary discomfort, such as gum or tooth sensitivity. But these symptoms disappear within 1 to 3 days after the treatment is completed. -> How much does the different methods of tooth whitening cost? The charges vary with location, types of treatment and product used. But Laser or power whitening treatment is always expensive than professional bleaching and home based bleaching. -> How to look after the teeth once they have been whitened? One should eliminate those foods and drinks that stains the teeth and at the same time should stop smoking. He should brush his teeth twice a day with fluoride toothpaste and visit the dentist at least once a year.