my experience with...

 I've never given teeth much thought. Floss, brush twice a day, that's usually all most people think about concerning them. I was the same, at least, until I suffered an injury that chipped one of my teeth right down the middle, narrowly avoiding exposing the nerve. It was a very traumatic experience, physically and mentally.
 It happened at school, worst of all. In gym class, a friend accidentaly tripped me near the brick wall of the gymnasium, and well, one of them emerged victorious. (The friend apologized profusely, though we did later stop talking on bad terms...)
 Luckily, my tooth took the entirety of the blunt force, so I didn't suffer a concussion alongside this, but at this time in my life, my mother and I had very little money and no health insurance (I am a resident of the US, if that wasn't evident), so this injury was immensely stressful for me as a child who was always hyperaware of financial strain.
 I think this injury is what sent me into a slight fixation on teeth. Not in the dentistry way, just in an aesthetic, visual interest sort of way. Nowadays, teeth are the first thing I notice about people when I meet them. Even before the injury, my teeth were already rather unique (messed up), so now I tend to accidentally staring at others I'm speaking to who have a similar condition.
 Besides from an aesthetic appreciation for teeth, I struggle with a lot of issues with my own set. While I've never had a cavity, my molars have a habit of cutting into my tongue and, at times, rendering me physically nonverbal as movement of my jaw irritates it further.
 A current attempt to break my nail-biting issues has rendered me to bite anything else I can get my hands (jaws) on, another issue that has wrecked my lips and the inside of my cheeks (as well as several dozen pens, pencils, paintbrushes, erasers, etc.)