Teeth whitening is the method of bleaching the teeth to make them whiter. Teeth whitening will not make the teeth completely white, but it will lighten them by many shades. Teeth whitening in the conventional sense entails multiple visits to the dentist as well as treatments at home wearing a mouthguard containing bleaching gel. The whole procedure takes a few months. Laser whitening, also known as power whitening, is a newer treatment that takes about an hour and is performed at the dentist’s office. Teeth whitening is a cosmetic procedure, so it’s usually only done privately.