Tooth whitening commonly known as tooth bleaching are performed to correct tooth discoloration. This discoloration may have been caused by staining, aging or chemical damage to teeth. Tooth whitening procedure can be carried out in home or at office. Home whitening procedure involves fabricating a custom-fitted tray, which acts as a reservoir for the whitening gel that needs to be worn up to two hours daily or at night for about two weeks. In-office whitening this procedure takes from 30 minutes to one hour per visit, and you may have to return for several visits to achieve the desired whiteness. To protect your soft tissue, a gel-like substance may be applied to your gums and a rubber "shield" may be placed around the necks of the teeth. An oxidizing agent (the bleaching solution) is then applied to your teeth. Sometimes, a special light is used at five-minute intervals to help activate the whitening agent.
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