I dunno about enamel reconstruction (though I was under the impression that materials used to _replace_ tooth enamel have gotten enormously better in the last f

I dunno about enamel reconstruction (though I was under the impression that materials used to _replace_ tooth enamel have gotten enormously better in the last few decades to the point where your fillings will wear down slower than your teeth), but life expectancy has also been slowly increasing over the past few decades, and a significant fraction of that comes from people staying relatively healthy for longer.