So, how do baby’s teeth grow ? The baby teeth actually starts growing during the 6th week in the mothers uterus. These baby teeth growth starts with the Bell shape tooth germ. This Bell shape structure seen is actually the enamel organ, which will eventually grow into a baby teeth. As you can see the enamel organ or tooth germ contains numerous cells. These cells will continue to grow and differentiate into different and more advance cells to form the tooth. The outer and inner enamel organ eventually forms the outer casing of the tooth called the enamel layer. Where else the dental papilla cells will form the inner section of the tooth known as the pulp chamber. The permanent tooth bud will continue to grow into the permanent teeth after the baby tooth eruption is completed in the mouth.