Sheesh, it sounds like your family dentist was mercury-mad!
But it seems you too are doing well regardless.
I explain to my son that dentists are likely to overdo dental work simply because this is how they make their living.
He is a bright boy and he sees my point, though I haven't been able to get him into OP (yet) either.
Wow, terrific job you are doing with your kids. They are lucky to have you for a dad.