I can’t answer your questions, but I can tell you that my own experience was very similar to yours.
I was told a few years ago that I had a crack in a tooth. Dentist wanted to remove, replace tooth. This involved major dental proceedings over several visits. I was not eager to got through all that for a tooth that gave me no trouble.
Tooth still doing its job without any dental procedures, including several rounds of shmurah matza and honey-dipped apples.
Of course there’s a possibility frumguy and I have just had spectacular mazel with our teeth…
So I have to ask–
Anybody else?