if your tooth is partially broken, dentists can fix that by adding a synthetic filling on top of it. It's just a temporary solution, so it can break out all the time.
Or, it really was for not thanking Mr. Skeltal, which is actually a more likely explanation.
I showed this to my mother who works in dentistry, she said the most likely thing is that the girl had broken that tooth before and gotten a veneer tooth.
If it is not properly sealed to what is left of the real tooth, **** like this happens.
This should make me cringe, but I've chipped my front teeth so many times that at this point the dentist has my tooth color on file and I can get them fixed the next day.