Children typically begin losing their primary teeth from around 6 years of age. From 6-12 years, children have a mixture of adult as well as baby teeth. By about 12 years, most children have all their grown-up teeth besides the third molars (wisdom 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 concerning kids dentist as well as your child's teeth growth, see your dental professional.