image taken from : http://instoresnow.walmart.com/Wellness-Center-Article_ektid64974.aspx
Tobacco, coffee, cavities, aging and drugs can stain teeth. Treatment for discolored teeth depends on the magnitude of the stain; remedies appear here in order of increasing intensity.
- Brush and floss regularly to reduce or prevent stains
- Try whitening toothpastes. Though heavily advertised, these only partially whiten teeth and don't provide a complete remedy. Make sure the toothpaste has the Government approval (for example : from ADA) and has been clinically proved to whiten teeth effectively. Very few whitening toothpastes have undergone any type of clinical trial, and ones that are too abrasive can damage teeth or make them very sensitive
- Get regular dental cleanings, which remove many food and tobacco stains. No amount of cleaning will remove the severe staining left by tetracycline or systemic disease because these pigments lie inside the tooth; you'll have to take more aggressive measures against these
- Consider the two options, in-office and at-home treatments, for bleaching your teeth. A dentist performs in-office treatments by coating the teeth with a bleaching agent, then using periodic flashes of light to activate the solution. Treatments last 30 to 60 minutes, and the complete procedure often requires several appointments. In at-home treatments, patients wear a mouth guard fitted with bleaching gel 2 hours a day for two weeks, depending on the severity of staining
*this article taken from : ehow.com
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