Brushing with salt has two main benefits: first, it cleans the soft tartar and food debris from the tooth surface by friction. Secondly, salt has a certain bactericidal effect, which can dehydrate the bacteria in the mouth. However, salt is not a professional toothpaste, and there are certain hazards in using it for a long time: First, salt particles are rough, which can easily lead to scratches on the tooth surface, but instead, it is more likely to lead to food residues adhering to the tooth surface and even too much calculus. Second, although salt can dehydrate the bacteria, but also the normal cells in the mouth, oral mucosa dehydration. Therefore, it is not recommended that patients use salt instead of toothpaste for brushing, and it is recommended that patients use normal fluoride toothpaste, which has a certain anti-caries effect after cleaning the tooth surface.