What You Should Know About Teeth Whitening

Why Teeth Stain There are many causes of tooth discoloration. The most common causes include consumption of staining substances (smoking, coffee, tea, soy sauce, berries and colas), tetracycline (antibiotic) staining, excessive fluoride, old fillings, aging and genetics. Store-bought whitening toothpastes can remove external stains that are on teeth, but stains that are deep within teeth won't bleach out. Whitening toothpastes and professional dental cleanings will not change the internal color of teeth, nor will they be able to remove intrinsic stains located deep within the teeth. How Does Whitening Work? There are basically two ways to whiten teeth professionally--customized whitening ...

Source: http://www.metronycdentist.com/blog/2010/06/teeth-whitening-myths--facts.htm

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