Toothpastes are divided into fluoride toothpaste, desensitizing toothpaste, whitening toothpaste, etc. according to their ingredients and functions. Fluoride toothpaste contains about 1,000 ppm (parts per million) of fluoride, which is effective in preventing tooth decay. Children’s fluoride toothpaste contains 500 ppm of fluoride and is available in fruit flavors, etc., and is suitable for children. When the minerals on the surface of the teeth are lost and cavities are formed, the right amount of fluoride can accelerate the replenishment of the lost minerals, so that the initial cavities can be repaired. It also strengthens the teeth and the acid resistance of teeth. It inhibits the growth of germ film and weakens the ability of bacteria to produce acid. Desensitizing toothpaste can help to seal the exposed dentin of the teeth and reduce the degree of tooth sensitivity. Different brands contain different chemical compositions. Since anti-sensitizing toothpaste cannot replace regular toothpaste for long-term use, you should seek the advice of your dentist before using it. Whitening toothpastes generally contain coarse particles that are designed to abrade away the stains on the surface of the teeth to obtain the effect of bleaching the teeth. However, long-term use of these toothpastes can cause roughness on the surface of the teeth and eventually make it easier for plaque to settle on the teeth. Zhang Ping of the Department of Stomatology of MCCCI Comprehensive Outpatient Center gives children fluoride toothpaste, which can help control the incidence of tooth decay to a certain extent. Considering the issue of safe use, we hope to let children use fluoride toothpaste after 4 years old. Adults should help to control the amount of use.