S.
My son is 3.5 and I just took him for his first dental appt. They just polished his teeth and counted how many teeth he had. They said xrays were not needed yet to see how his next set of teeth were doing up in his gums. I was told that he will need to be seen every six months now for a cleaning. I thought that 3.5 was kind of young to be seen by a dentist but it seems to be the norm according to everyone I've talk with.