Susan Lopez of the San Francisco Dental Hygiene Society (SFDHS) accepts a donation from Oral-B on behalf of SFDHS on Thursday, Oct. 18, 2012, in San Francisco, Calif. (Photo by Alison Yin/AP Images ... more 
Susan Lopez of the San Francisco Dental Hygiene Society (SFDHS) accepts a donation from Oral-B on behalf of SFDHS on Thursday, Oct. 18, 2012, in San Francisco, Calif. (Photo by Alison Yin/AP Images for Crest and Oral-B) less 
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Associated Press
Thu, Oct 18, 2012 10:26 PM EDT