Disinfection method: According to the bacterial culture of used toothbrushes by two dentists in the United States, after 4 weeks of continuous use, the new toothbrush contains various bacteria such as Candida albicans and hemolytic streptococcus, which can pass through blood vessels and lymph. The t

Human ancestors had the habit of gargle and brushing teeth. In 3000 BC, the first tool for cleaning the mouth was found in the tomb of the king of Ur city-state of Sumer. One can last for two weeks. In ancient Greece and Rome, people used animal ashes as tooth powder to clean their mouths, and some