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Associated Press
IMAGE DISTRIBUTED FOR CREST AND ORAL-B PRO-HEALTH - Keller Bowman receives a digital image of the plaque on his teeth at a Crest® and Oral-B® Pro-Health® event at Walgreens in Chicago on Friday, May 24, 2013. Crest and Oral-B are hosting the three-day event to help educate people on the plaque that may be left behind. (Peter Barreras/AP Images for Crest and Oral-B Pro-Health)

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