With the improvement of people’s living standards, oral disease (commonly known as “dental disease”) is more and more people pay attention to, more and more people realize that “good teeth, good appetite, eat well, the body doubly great”. Moreover, people’s understanding of oral disease gradually from the treatment stage, upgraded to the prevention stage, so how to improve oral health has become a growing concern of the health of the new topic. Caries (commonly known as “dental caries”) is a common and frequent disease in oral diseases, and is the main cause of tooth loss and dental defects. Caries is the result of a multifactorial effect (bacteria, food, genetics, and time), which is related to the role of sensitive hosts, oral cariogenic flora, and suitable substrates, which must be retained in the oral cavity for a sufficient period of time. The sensitive host is related to the host’s own factors, such as genetics and developmental factors. In terms of substrates, the acid-producing capacity of various sugars is positively correlated with their cariogenicity, in the following order: sucrose, glucose, maltose, lactose, fructose, sorbose, and xylitol. Sorbose and xylitol basically can not be used by caries-causing bacteria to produce acid, so it is often used as a caries-preventive sweet substitutes, thus effectively reducing the occurrence of caries. Acid production by bacteria is harmful to teeth, and it takes a certain amount of time (at least 2 hours) for the concentration of acid to reach a certain level before it can demineralize the tooth. If it is possible to prevent caries within 2 hours after a meal, we use mechanical or chemical methods to interfere with the normal role of the oral cariogenic flora to achieve the role of caries prevention. Among them, tooth brushing can be an effective method to achieve the effect of controlling flora and preventing caries. Shandong University Stomatology Hospital Stomatoprosthetic Sun Huiqiang recommended the following method of brushing: rotary brushing method: this method can choose a medium hard bristle or soft bristle toothbrush, the bristles do not enter the gingival sulcus, so the toothbrush will not damage the gums, and plaque removal effect is more powerful. The main points of the method are as follows: 1. brush bristles parallel to the long axis of the teeth, the end of the bristles pointing to the gingival margin, and then pressurized to rotate the toothbrush, so that the brush bristles and the long axis of the teeth at an angle of 45 degrees. 2. 2. Turn the toothbrush so that the bristles are brushed from the gingival margin to the tooth surface, i.e., the bristles are brushed downward along the tooth gap when brushing the upper teeth, and brushed upward from the bottom when brushing the lower teeth. 3. Each part of the brush 2-4 8 beats, that is, brush 16-32 times, and then move the toothbrush position. There is a “three, three, three” principle of brushing, that is, brush three times a day, each time to brush three minutes, each time to brush three sides of the teeth (lips and cheeks, tongue and palate and occlusal surface). The teeth of the whole mouth should be brushed in a certain order, do not miss. Each time you move the brush, there should be a proper overlap so as not to miss the surface of the teeth. For the back of the buccal and lingual sides of the big teeth, especially with the gingival joints, due to the height of the teeth is limited, up and down the rotary toothbrush is not convenient, you can moderately increase the front and back horizontal brushing techniques, in order to increase the effectiveness of the cleaning of the place. Conventional brushing with a toothbrush can only remove about 70% of the plaque, and plaque often remains on the neighboring surfaces of the teeth, encouraging the use of flossing or other tools (such as interdental brushes and flossing clips, etc.). Flossing is the easiest way to remove plaque. In addition, toothpaste can significantly increase the effectiveness of brushing. The mechanical cleaning effect is enhanced by the friction and cleansing agents contained in the toothpaste. In recent years, there are many types of toothpastes containing medications, which are mainly anti-caries, anti-bacterial, hemostatic, desensitizing, and halitosis-reducing. For example, brushing can be used to provide a carrier for topical fluoride on the tooth surface. There is sufficient evidence that the use of fluoride toothpaste brushing is the main reason for the decline of caries in developed countries since the 1970s. However, drugs only play an auxiliary role in removing bacteria, mainly by the mechanical scavenging effect of toothbrushing. Conclusions on the evaluation of the effectiveness of toothbrushing: Brushing remains the most basic and effective means of oral cleaning. In the absence of pre-existing oral diseases (e.g., caries, periodontal disease, etc.) or oral diseases that have been well-treated, better oral hygiene can be maintained through careful and correct brushing, effectively preventing the occurrence of oral diseases and maintaining oral dental health.