Pacifiers & Teeth Damage
This type of sucking is completely normal for babies and young children. It provides security. For young babies, it's a way to make contact with and learn about the world. In fact, babies begin to suck on their fingers or thumbs even before they are born.
However, some children don't drop the habit, and in these children, the upper front teeth may tip toward the lip and not come in properly.
Your pediatric dentist will carefully watch the way your child's teeth come in and jaws develop, keeping the sucking habit in mind at all times. For most children, there is no reason to worry about a sucking habit until the permanent front teeth are ready to come in.