When do you start bringing your toddler for dentist visit? Where can we bring them to dentist visit?

I bring my Son for dental check up since 4yo. It actually depends on individual as my boy teeth are more prone to decay. So he already did filling at age 4. He seldom snacks, no using of milk bottles and he brush teeth since 3. But Dentist say some people are just more prone to decay so we just gotta take note.