Children typically start losing their baby teeth from around 6 years of age. From 6-12 years, children have a blend of adult as well as primary teeth. By about 12 years, a lot of children have all their adult teeth besides 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 also. If you're worried about kids dentist and also your kid's teeth advancement, see your dental practitioner.