Teeth whitening is a relatively simple and non-invasive way to improve your appearance. Several teeth whitening procedures exist, and you can lighten your teeth by several shades. All of the commonly used techniques are safe, although there are sometimes side effects. The American Dental Association, or ADA, warns teeth can be permanently damaged in very rare cases. Choose the best option for you by knowing the risks ahead of time.
Definition
Teeth whitening is a generic term that refers to lightening the teeth in one of several different ways, according to the ADA. Some methods remove stains from a tooth's surface, while others actually change its color by bleaching it.
Techniques
The ADA explains teeth whitening toothpastes scrub away surface stains left by food and beverages. The toothpastes use chemical chelation or polishing agents to gently scrape away stains over time.
Tooth whitening treatments are performed in a dentist's office or at home. These treatments contain a bleaching agent called carbamide peroxide in varying strengths. Products used or prescribed by dentists are stronger than over-the-counter options.
Time Frame
Whitening toothpastes typically take weeks or months to make a noticeable difference in teeth color. Dr. Dan Peterson of Family Gentle Dental Care in Gering, Nebraska, recommends selecting a toothpaste with the ADA's approval seal.
The ADA states over-the-counter and dentist-dispensed home whitening products are used for two to four weeks. In-office treatments are the quickest, taking about an hour. This is because dentists use stronger products and protect the gums with a rubber guard called a dental dam or protective gel. Such protection is not possible at home.
Risk
There is some risk associated with teeth whitening at home or in the dentist's office. The ADA explains the teeth may become sensitive to hot and cold food and beverages. The gums and other soft tissues sometimes get irritated from the bleaching agent or the tray used for in-home treatments. This is more common with over-the-counter products because dentists make custom trays for the whitening treatments they dispense. All of these effects typically disappear on their own once the procedure is done.
Warning
Severe adverse reactions to teeth whitening are rare, but the ADA warns they do happen occasionally. Your teeth could be permanently damaged by an adverse incident. Choose a professional carefully to perform your teeth whitening to reduce the risk. Have your regular dentist do it or ask her to recommend someone.
American Dental Association spokesman David Sarrett advises against buying teeth whiteners over the Internet in case the supplier fails to balance the ingredients correctly, which could damage your teeth. If you opt for home teeth whitening, choose reputable products at your local pharmacy or store.
Georgetown University Hospital researchers found a possible link between teeth whitening and oral cancer based on a study of two individuals, but Bruce Davidson, M.D., the hospital's chairman of head and neck surgery, states the results are very preliminary and more investigation is needed.
