Teeth Whitening News Tooth bleaching, also known as tooth whitening, is a common procedure in general dentistry but most especially in the field of cosmetic dentistry. Many people consider white teeth to be an attractive feature of a smile. A child's deciduous teeth are generally whiter than the adult teeth that follow. As a person ages the adult teeth often increase in value--that is to say, they become darker. This darkening is due to changes in the mineral structure of the tooth, as the enamel becomes less porous. Teeth can also become stained by bacterial pigments, foodstuffs and tobacco.<br> <br> http://www.naturalelements.co.uk/teeth-whitening-index/ http://blogs.law.harvard.edu/tech/rss Mon, 20 Aug 2007 10:14:03 +0100 Mon, 20 Aug 2007 10:13:30 +0100