To choose toothpaste, first of all, you should know that toothpaste is not a magic weapon for healthy teeth, it is only an auxiliary for brushing teeth, with the role of abrasion and removing plaque, cleaning and polishing the surface of the teeth, making the mouth fresh. At present, the toothpaste used in China is divided into three categories: ordinary toothpaste, fluoride toothpaste and pharmaceutical toothpaste. The main ingredients of ordinary toothpaste include abrasive, cleaning agent, wetting agent, antiseptic and aromatic agent, which have the common functions of ordinary toothpaste. However, with the development of science and technology, people found that fluoride can prevent caries, and it has been proved in practice for many years that fluoride, after contacting with teeth, causes hydroxyapatite, which is easily dissolved by acid, to form insoluble fluorapatite in tooth tissue, thus improving the anti-corrosion ability of teeth. Some research proves that the incidence of tooth decay is reduced by about 40% when this toothpaste is commonly used. Fluoride has sodium fluoride, potassium fluoride, stannous fluoride and sodium monofluorophosphate. But we should know that fluorine is a toxic substance, if the human body absorbs too much, it will cause fluorosis, the national regulations, fluoride toothpaste free fluorine should be between 400-1200Pm, especially note that children before 3-4 years old should not use it, because 1/8-1/4 of toothpaste may be swallowed by them into the stomach . Drug toothpaste is based on the ordinary toothpaste with certain drugs, when brushing teeth, the toothpaste reaches the tooth surface or the environment around the teeth, through the action of drugs, reduce the plaque, so as to play a role in the prevention of caries and periodontal disease. At present, medicated toothpaste is extremely popular, and it is an ideal way to use toothpaste to promote medication with preventive effect or therapeutic effect. Firstly, the toothpaste cannot be kept in the mouth for too long, that is, it is rinsed out, which makes it difficult for the drug to exert its effect in a short period of time, and the special drug dose must also avoid stimulating the soft tissues in the mouth, thus it cannot be raised to a sufficient effective concentration, and the effect of the toothpaste itself is often blocked by the dirt in the mouth or limited by the morphological characteristics, thus it is difficult to reach the area of real pathogenesis. Secondly, the drugs in toothpaste, often due to the placement of time and other chemical changes, the loss of the original efficacy, effective drugs and often because of the odor and not suitable to put into the toothpaste, in addition to the drug resistance problem, these factors indicate that the drug toothpaste is not suitable for long-term use a, drug toothpaste is a good idea, but to really achieve the effect of prevention of oral diseases still need to make some in-depth research. Therefore, in the face of many varieties of toothpaste, first of all, we should understand the performance of various toothpastes and not blindly believe in the product description, fundamentally speaking, toothpaste is only mainly used to clean teeth, some businesses exaggerate the role of toothpaste one-sidedly, even advocate their toothpaste can treat dental caries, treat periodontitis, etc., are exaggerated words, which often mislead consumers, so that consumers do not get timely treatment of dental caries and periodontitis, etc. This will delay the condition. Therefore, it is best to consult with a dental professional to choose the right toothpaste according to the actual situation of your mouth. Zheng Xiang, Oral Medicine Center, Henan Provincial People’s Hospital