As title says.
Our 6 yo Ds has just lost his first tooth, he's very excited about it. And seems to have very healthy teeth.
3yo DD obviously hasn't lost a tooth yet and again seems to have a healthy mouth. In fact she loves brushing her teeth and often asks to do it throughout the day.
But as yet neither of them have been to see a dentist 
And with the new guidelines that state before they are 1 I'm guessing we're well behind?
For the record, I go every 6 months. My wife goes once every two years as advised by her Dentist.