Rolando Carcamo, receives a digital image of the plaque on his teeth at a Crest® and Oral-B® Pro-Health® event at Rite Aid in North Hollywood, CA. on Monday, May 13, 2013. Crest and Oral-B hosted the three day event to help educate people on the plaque that may be left behind. (Eric Reed/AP Images for Crest and Oral-B Pro-Health)

Associated Press
Rolando Carcamo, receives a digital image of the plaque on his teeth at a Crest® and Oral-B® Pro-Health® event at Rite Aid in North Hollywood, CA. on Monday, May 13, 2013. Crest and Oral-B hosted the three day event to help educate people on the plaque that may be left behind. (Eric Reed/AP Images for Crest and Oral-B Pro-Health)
Rolando Carcamo, receives a digital image of the plaque on his teeth at a Crest® and Oral-B® Pro-Health® event at Rite Aid in North Hollywood, CA. on Monday, May 13, 2013. Crest and Oral-B hosted the three day event to help educate people on the plaque that may be left behind. (Eric Reed/AP Images for Crest and Oral-B Pro-Health)
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