A very interesting question was asked by Dr. YanFang Ren, DDS, PhD, of the University of Rochester Medical Center's Eastman Institute for Oral Health: Which damages teeth-whitening agents or orange juice? 

Dr. Ren and his research team went about their inquiry by comparing the effects of orange juice to that of teeth whitening gel typically dispensed in dental offices.  Using a very powerful microscope for the first time in this way, they were able to look at tooth enamel in great detail.  They also used fine measuring devices to determine tooth hardness after each agent was placed on the tooth.

In their experiment, the team exposed teeth to either whitening agent or orange juice for 20 minutes five times.  This simulated whitening teeth over five days, and drinking juice for the same amount of time over a five day period.

What the team found was that the effects of the whitening agent were insignificant when compared to acidic fruit juices.

Orange juice reduced enamel hardness by 84%, and increased the overall roughness of the tooth surface significantly.  No significant changes were found on enamel exposed to the whitening agent.

Orange Juice vs. Tooth Whitening - Which Damages Teeth? (page 1 of 2)
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