With more and more players getting into the “teeth whitening” business these days, and with fads like “Charcoal whitening products” saturating the market, there needs to be a reason for people to entertain the thought of visiting their local cosmetic dentist for teeth whitening.

This article here explains why that should be the case: http://ezinearticles.com/?The-Case-for-Professional-Teeth-Whitening&id=9761298