In a toothbrush with dense bristles, bacteria can "go down and multiply" and then "become anaerobic," which means it could become a more aggressive form, according to Phillips. "Toilet bacteria ...

It has 18,000 bristles and a U-shaped mouthpiece, and it does the brushing for you. Plus, I met up with the company's CEO to ...

It has a long tapered brush head, which makes it easy to get the bristles to the back of your baby or toddler's mouth, and double-sided bristles, which help you brush more teeth at once.

It has 18,000 bristles and a U-shaped mouthpiece ... the Shark Tank-famous orthodontist who invented the Big Mouth electric toothbrush.) Brown estimates that nearly 50% of American adults ...

For two years, he's been using an electrically charged gadget with high-speed, rotating bristles. "I like it because it tickles," he says, and imagines that now a regular toothbrush would feel ...