Youngsters generally start shedding their baby teeth from around 6 years of age. From 6-12 years, children have a mix of grown-up and also primary teeth. By about 12 years, most children have all their adult teeth with the exception of the 3rd molars (wisdom teeth). There are 32 grown-up teeth. If your youngster's baby teeth came late, the adult teeth will most likely be late as well. If you're concerned about kids dentist as well as your kid's teeth advancement, see your dental expert.