Human teeth chew through many different materials over years of use, and many popular foods and beverages can leave a smile with unsightly stains and discoloration that will not respond to common oral hygiene techniques. Fortunately, many dentists offer effective and reliable teeth whitening treatments that can lift stubborn stains and brighten the smile by up to eight shades. Here’s a brief guide to how the whitening process works as well as a few factors that may make multiple treatments necessary.
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