As soon as a child's first periodontal cavity closes (at the age of 2-3 years), enough bacteria accumulate in it overnight to start developing gingivitis and tooth decay. Because these disease processes are imperceptible and slow, after a few years we only see the sad result of caries "cleaning" the gums. 🕳 If you want to protect your child, make sure you use a toothbrush to clean the bacteria and plaque that accumulate in the gums. It would be perfect if an oral hygienist could choose the right size brush for you. ✅