My daughter is 4 years old and is used to sucking her thumb. Will it cause her teeth to grow outwards?
As long as the habit stops before the permanent teeth erupt, the permanent teeth should not come in flared. However, there are some skeletal (genetic) growth patterns that the front teeth erupt into the mouth more flared than ideal. My recommendation is to try to stop the habit before the adult teeth begin to erupt. Prior to that age, stopping a finger habit is very difficult based on patient maturity.
Michael J. Maslowski, DDS, MS