Are there ways to prevent cavities before they form?

Yes, there are methods with proven effectiveness against cavities: 1) brush with fluoride toothpaste at least twice a day and never skip brushing before bed, 2) clean between the teeth with floss, 3) have sealants placed once the permanent molars come in (covered by the National Health Insurance for ages 18 and under), and 4) combine fluoride application with check-ups every 3 to 6 months. Adding dietary control - reducing how often your child eats sticky, sweet snacks - makes a big difference. However, if you can already see white or brown spots, it may be an early cavity, so start with an examination.