Youngsters generally begin shedding their primary teeth from around 6 years old. From 6-12 years, children have a blend of grown-up and primary teeth. By about 12 years, most children have all their adult teeth except for the third molars (wisdom teeth). There are 32 grown-up teeth. If your kid's primary teeth came late, the grown-up teeth will possibly be late too. If you're concerned concerning kids dentist as well as your youngster's teeth growth, see your dental expert.