It’s important for children to overcome dental fears in order to have the best start for a healthy smile.
Key points:
– A kid-friendly dentist can make dental appointments fun.
– Role-playing dental visits at home helps your child learn what to expect.
– Reward your child after a visit to reinforce the positive aspects.
Children should see a dentist when their first teeth arrive or by the time they are one.
“Remember, if your child feels good following a dental appointment, he or she may be more likely to respond positively to the dentist in the future.” 
More tips:
https://www.workingmother.com/afraid-of-the-dentist#page-2