Health & Fitness: Health & Fitness

A new brush-off for the gums

American plaque sufferers, all 100 million of you, take heart. In addition to special pastes and floss, there is now Interplak, a battery-operated brush specially engineered to combat the residue of food and bacteria that collects between and under teeth and can eventually lead to gum disease. Unlike the head of an ordinary electric model, the one on Interplak does not move; instead, its ten tiny tufts rotate, each making 1 1/2 turns, then reversing direction. "All the power is in the bristles," says John Trenary, president of Dental Research Corp., the Georgia-based firm that makes the device. Company-sponsored studies show...

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