I was born in (gasp) 1963. The water where we lived wasn't flouridated at that time, and my teeth and their zillion fillings are proof of that. It was the same with most of the kids in my class. We all had those nasty old-fashioned silver caps on some of our rotten baby teeth as well as a mouthful of fillings.
Fast forward five years, and my brother comes on the scene, coincidentally one year after the city decided to add flouride to the water. He has had two tiny fillings in his entire life.
Apparently, flouride in the water helps babies even in utero to have better, stronger teeth. Flouride in toothpaste reinforces that. Sigh. Born too late! I have one tooth that's going to have to be crowned if that filling goes. Ka-ching, there goes a thousand bucks.