Dental Implants
Tooth whitening isn't just for the movie stars, and it isn't just for one day. Many people have had their teeth whitened, and probably millions more are thinking about it. The desire for a brighter smile with whiter teeth is very strong, and tooth whitening safely lightens the color of the teeth, lasting for up to five years. The most effective and safest method of tooth whitening is dentist-supervised.
Generally, whitening is successful in at least 90 percent of patients, though it may not be an option for everyone. Consider tooth whitening if your teeth are darkened from age, coffee, tea or smoking. Teeth darkened with the color of yellow, brown or orange respond better to lightening. Other types of gray stains caused by fluorosis, smoking or tetracycline is lightened, but results are not as dramatic. If you have very sensitive teeth, periodontal disease, or teeth with worn enamel, your dentist may discourage whitening. The active ingredient in most of the whitening agents is 10 percent carbamide peroxide; when water contacts this white crystal, the release of hydrogen peroxide lightens the teeth.
Lightness should last from one to five years, depending on your personal habits such as smoking and drinking coffee and tea. At this point you may choose to get a touch up. This procedure may not be as costly because you can probably still use the same mouthguard. The retreatment time also is much shorter than the original treatment time. Several studies, during the past five years, have proven whitening to be safe and effective. The American Dental Association has granted its seal of approval to some tooth whitening products. Some patients may experience slight gum irritation or tooth sensitivity, which will resolve when the treatment ends.
After 'Dental Fact Sheet.' Academy of General Dentistry