Cavities are a destructive disease caused by bacterial infection of the hard tissues of the teeth. The first step in preventing cavities is to understand the causes and implement basic prevention measures. Firstly, the condition is associated with bacterial infection, and controlling dental plaque through effective brushing can help. Data shows that dental plaque can easily reattach to teeth within eight hours after brushing. Therefore, it is recommended to brush your teeth twice a day, in the morning and evening. Some people are accustomed to brushing at night and just rinsing in the morning; however, this practice is incorrect as effective brushing helps control the accumulation of dental plaque. Secondly, diet plays a role, with sugary foods, especially sucrose, being particularly conducive to cavities. It is advisable to reduce the intake and frequency of sugar consumption. Additionally, effectively supplementing calcium can help prevent inherent enamel hypoplasia of the teeth. If the mother experiences calcium deficiency during pregnancy, there is also a higher risk of cavities.