I had a lot of fillings in my baby teeth, because my Mum used to give me strong Ribena to drink from a young age.
My adult teeth have always been healthy, but I had fangs growing from my upper gum as a teenager, and had to go through 42 injections to have those removed because for some reason the injections just weren't working. In the end I gave up, said my mouth was numb, and faced the pain to get it over with. That's obviously the worst thing I've ever had done.
I had to have braces for years after that, and though they worked I've now got wisdom teeth which caused problems and moved all my teeth; but they're still in good condition.