The Oral-B and Crest booth Thursday, Oct. 18, 2012, in San Francisco, Calif. (Photo by Alison Yin/AP Images for Crest and Oral-B)

Associated Press
The Oral-B and Crest booth Thursday, Oct. 18, 2012, in San Francisco, Calif. (Photo by Alison Yin/AP Images for Crest and Oral-B)
The Oral-B and Crest booth Thursday, Oct. 18, 2012, in San Francisco, Calif. (Photo by Alison Yin/AP Images for Crest and Oral-B)
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