Teeth bleaching products may weaken enamel

April 23, 2009 A new study in the Journal of Dentistry finds teeth bleaching products for home use may minimally reduce the surface hardness of tooth enamel and enamel's ability to "bounce back" from normal wear and tear.

But scientists say, the good news is, the effects may not be detectable. They add, human enamel has been shown to heal itself and rematerialize over time, meaning it has the ability to restore back the levels of surface calcium that has been lost due to bleaching.

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