Suggestion: Dental caries is a multifactorial disease, which mainly includes three aspects: bacteria, diet, teeth and saliva, which are interrelated. Children should pay attention to keeping their oral cavity clean, develop the habit of brushing their teeth in the morning and evening, and gargle after meals. When brushing their teeth, pay attention to brushing vertically instead of horizontally, and brush both inside and outside. Eat less snacks and sweets, especially before going to bed. Take their children to the stomatology department for regular examination. What are the most common oral diseases for students? There are no bugs in the worm teeth, but because the food residues are not brushed and rinsed in time after chewing food. Under the action of bacteria, food residues ferment, produce acid, erode teeth, decalcify and soften teeth, and then slowly form cavities, that is, dental caries. According to statistics, the prevalence rate of dental caries in primary teeth of children in China is 81% to 91%, and that of permanent teeth is 41%.