There are more bacteria in your mouth than there are people on earth. And if you don't brush your teeth regularly, these bacteria can cause bad breath, tooth decay, and gum disease. It's estimated that there are more than 700 different types of bacteria that live in the human mouth, and they can multiply rapidly if they are not kept under control. Brushing your teeth twice a day and flossing daily can help remove the bacteria and prevent them from causing dental problems.
