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In this Wednesday, June 24, 2015, photo, the Ionic Proclean toothbrush is demonstrated during the CE Week show, in New York. The device generates negative ions by completing a circuit formed with the toothbrush, some water and a person's palm or finger. According to the company, the ions polarize plaque fluid to loosen and remove plaque. (AP Photo/Richard Drew)

In this Wednesday, June 24, 2015, photo, the Ionic Proclean toothbrush is demonstrated during the CE Week show, in New York. The device generates negative ions by completing a circuit formed with the toothbrush, some water and a person's palm or finger. According to the company, the ions polarize plaque fluid to loosen and remove plaque. (AP Photo/Richard Drew)

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