Youngsters generally start losing their baby teeth from around 6 years old. From 6-12 years, children have a combination of grown-up and baby teeth. By around 12 years, a lot of youngsters have all their adult teeth besides the third molars ( knowledge teeth). There are 32 adult teeth. If your youngster's baby teeth came late, the grown-up teeth will most likely be late too. If you're concerned regarding kids dentist as well as your child's teeth growth, see your dental practitioner.