All bacteria are bad for the health of your teeth and gums.

All bacteria are bad for the health of your teeth and gums.

• True
• False

While some bacteria are bad for your teeth and gums, others are critical to keeping them healthy. In fact, some helpful organisms in your mouth secrete substances that kill bad bacteria. Researchers are exploring a potential new kind of toothpaste based on a mouth bacterium that creates enzymes that prevent plaque formation.