I also have terrible teeth and will need dentures in a few years. I have 2 broken teeth, several crowns, everything else has fillings.
If sharks are programmed to constantly get new teeth, I wish a scientest would figure out how to graft that particular gene onto our DNA so we'd get maybe a 3rd set when we're 45-ish and smart enough to take care of them this time?? Wouldn't that be great? (not the teething part but next to childbirth, teething wouldn't be so bad).