Treating cavities in baby teeth is essential to protecting the oral health of your child. The baby teeth play many important roles in the mouth. Not only do they help your child to bite and chew, but they also help your child develop proper speech. The baby teeth also hold space in the mouth for the developing adult teeth. If a cavity develops in a baby tooth, it can lead to an infection, which can cause infections in the adult tooth underneath. Also, if a baby tooth is faced with severe decay, it may fall out, which can compromise the development and eruption of the adult tooth underneath.