(Concern) Is fluoride varnish effective?

Our child has been receiving fluoride varnish applications since 18 months old.

I do it regularly.

Is it still a matter of eating habits or is it something you're born with?

You get cavities.

Even permanent teeth develop cavities as they come in.

They also do home repairs, but it seems to be something you're born with.

The dental director says it's hereditaryㅜㅜ

I'm envious of these healthy people.