I just chipped a tooth. I must now go to the dentist. It's still not emergency-level urgent, because it's not actually my tooth that broke; it's a cap [edit: technically a veneer, not a cap] that I've had for roughly 15 years, ever since I broke off my two front teeth running around playing tag in a church basement.
I should have realized the cap wouldn't be permanent - it pretty much disintegrated today while eating my afternoon snack. It's probably been weak for years now - but no one would know, because I haven't been going to the dentist.
Hence, I am an idiot. No one should skip going to the dentist for years on end... but ESPECIALLY not if you have any dental work more complex than fillings.