- The first toothbrush with bristles was made in China in 1498. Bristles from hogs, horses, and badges were used. They were later found to be too abrasive and harsh. In 1938, the first commercial toothbrush with nylon bristles and a plastic handle was invented.
- You should replace your toothbrush after you have a cold, viral infection, or and episode of the flu. Microbes from these previous infections can implant themselves on the toothbrush bristles leading to re-infection.
- The first American to get a patent for a toothbrush was H.N. Wadsworth.
- The electric toothbrush first appeared in 1939.