Tooth whitening, also known as teeth whitening or bleaching is the process of bleaching natural staining of the teeth. The desire to own a beautiful white smile has made these treatments one of the most popular cosmetic treatments. Teeth become stained over time due to the exposure to tobacco, coffee's, tea's, soda's and other staining products. Teeth also lose whiteness due to age. As people get older the mineral structure in their teeth change and the enamel becomes more porous.

There are two common methods of tooth whitening. In office whitening is usually performed by a dentist and utilizes a chair- side blue LED lamp. The dentist applies a high concentration of the oxidizing agent for about an hour. The results are very noticeable, but usually fade a little within a few days.

At home treatment include the same whitening gels and the use of a tray. The peroxide is applied to the tray and placed in the mouth covering the teeth for 30 minutes to an hour. There is no set amount of time for people to use this treatment. Some people will require more or less treatment depending on the level of stain.

The length of time to whiten the tooth is affected by many factors. Natural discoloration of the tooth is always treatable. However, some stains can take longer to whiten.

The results of tooth whitening can last for several months. But the the whiteness will fade faster with consumption of staining products. It is recommended that people continue to treat their teeth in order to maintain their desired whiteness.

The procedures utilize oxidation agents such as carbamide peroxide and hydrogen peroxide. The peroxide penetrates the enamel and eventually whitens the dentin layer of the tooth. Typically carbamide peroxide is used. The concentration can range from 12% to 35%. The carbamide peroxide breaks down in the mouth to form hydrogen peroxide. Hydrogen peroxide can be used as well. 12% hydrogen peroxide compares to 35% carbamide peroxide.

Some side affects can be noticed. Gum and teeth sensitivity can result due to the use of the whitening gels. Sensitivity is usually temporary and is not permanent. If irritation persists, it is recommended that people use the treatment less frequently or a lower concentration of the gel is recommended.

Tooth whitening treatment is not recommended to all people. The peroxide will not whiten false teeth, or any other restorative materials. Women who are pregnant or lactating, people with allergies to peroxide and people with open mouth sores or cuts should not use the whitening treatments.

Overall, tooth whitening products are safe. They are available over the counter, at the dentist or online. As long as consumers take the proper precautions, they can expect to see a new whiter smile with these treatments.