Different methods of teeth whitening methods are applied by dentists that depend on the type of stains and other physical conditions of the teeth. One teeth whitening method is the use of in-office bleaching or chair-side bleaching. This method of teeth whitening requires two or more visits to the dentist and each visit lasts for thirty minutes to one hour. During the bleaching process, the dentist applies a protective gel to the lips and rubber shields to the gum to…