A toothbrush is a small cleaning tool with a handle and bristles that you use to scrub your teeth. The bristles are tiny, stiff fibers (usually made of nylon today) that work their way between teeth and along the gumline to remove food particles and plaque.

People have been cleaning their teeth for thousands of years, but the modern toothbrush we know today was invented in China around 1498. Those early versions used hog hair for bristles attached to bamboo or bone handles. The nylon-bristled toothbrush appeared in 1938, making toothbrushes cheaper and more hygienic.

Using a toothbrush properly means brushing for about two minutes, twice a day, reaching all surfaces of your teeth: the fronts, backs, and tops. Dentists recommend replacing your toothbrush every three to four months, or sooner if the bristles get worn and frayed.

Electric toothbrushes do the scrubbing motion automatically, spinning or vibrating thousands of times per minute. Whether manual or electric, a toothbrush's job is the same: keep your teeth clean and healthy so they can last your whole life. Regular brushing helps prevent cavities, keeps your breath fresh, and can stop gum disease before it starts.