Friday, August 26, 2011

How come I have stains on the back of my teeth?

I brush with crest pro health twice a day, floss once a day and use whitening mouth wash twice a day. And I wear braces. I don't get it? Why do i still have stains only on the back of my teeth. And i brush there too. I don't even know if the whitening toothpaste and mouth wash is working! Help me, I want to have white teeth!
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Do you smoke or drink cola? These habits can stain your teeth.
Source

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