Saturday, January 8, 2011

how long do teeth whitening kits last?

Im thinking of buying this one of those tooth whitening kits... http://www.overstock.com/Health-Beauty/C… Do these just cover the teeth with white or do they remove the stains? If they remove the stains completely as long as I clean well they should stay white? or do they gradually fade back to the original color?
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...they stay in the whitened state until you do someting to get them stained again!!!
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