Kids typically begin shedding their primary teeth from around 6 years of age. From 6-12 years, children have a combination of adult and baby teeth. By around 12 years, many children have all their adult teeth except for the third molars ( knowledge teeth). There are 32 adult teeth. If your child's primary teeth came late, the adult teeth will possibly be late as well. If you're concerned regarding kids dentist and your youngster's teeth growth, see your dental professional.