DO WHITENING TOOTHPASTES WORK?
Whitening toothpastes can ONLY affect the outer enamel layer, they do not affect yellowing of the inner dentin layer. In fact, sometimes whitening toothpaste can make inner-layer discoloring more noticeable.
Whitening toothpastes may contain strong abrasives or chemicals that can remove some stains on the outermost layers of a tooth. While these whitening toothpastes may be somewhat effective in removing stains from the outermost layer of your teeth, they can destroy tooth enamel in the process, particularly if used for EXTENDED periods of time. NO TOOTHPASTE has been proven effective for discoloration on the inner layers of your teeth.
Daily brushing (with non-whitening toothpaste) and flossing minimize discoloration, as can professional cleaning at your dentist’s office. Dentists also recommend rinsing your mouth with water after having wine, coffee, or other potentially staining foods. If you decide you want to further whiten your teeth, dentists may recommend a number of different treatments. These procedures are fairly safe as long as your dentist follows particular safety guidelines. You can find more information on teeth whitening from the American Dental Association.