When babies are born, they already have a lot of their teeth under their gum tissues. The very first tooth normally begins to emerge by the age of six months, although the exact age can vary from one infant to one more. The very first two teeth to come in are typically in the bottom center, adhered to by the 4 in the upper middle. The majority of children have a complete set of 20 baby teeth by the time they transform pediatric dentist. Some children do not get their teeth at the same time as their peers. This can be caused by numerous factors. If a child does not have any type of teeth by the age of 18 months, he or she must be required to a pediatric dentist for an assessment.