The teeth whitening products or teeth whitening kits containing brush-on gels, whitening sprays and toothpastes contain three percent hydrogen peroxide or ten percent carbamide peroxide that breaks down into oxygen molecules when they are applied in the teeth in the presence of light or heat source. The oxygen molecules enter the tiny pores of the enamel and dentin, and break up the stains that block out the light. More and more stains are broken into smaller pieces, as light passes through the teeth and makes them look lighter. Stains of yellowish to slightly brownish nature are best removed by this teeth whitening kit.

Results are noticed within an hour, overnight or within three to four days that solely depends on the type of bleaching gel used and the length of time it is applied on. The tooth appears lighter and whiter without the change in the structure of the tooth or damage to the enamel. Some gels include sodium hydroxide, carbomer, glycerin, sodium fluoride and flavoring ingredients that keeps the teeth strong and healthy. Perfecta teeth whitening appear after a week or month of application and lasts for at least three years. The lasting however depends greatly on personal habits.

In the professional methods of teeth whitening, the dentist use protective gel and rubber shield while bleaching the teeth. These products efficiently guard the gums, lips and soft tissues of the mouth. The plastic tray used in the Loaded Tray method of Teeth Whitening, efficiently carries the bleaching or whitening gel Carbamide Peroxide to be worn in the gum. One can notice 3 shades of color change after using the product.

Some irritation may occur when the teeth whitening products are used. In such case one should identify the product and stop its use or consult his dentist immediately.