What do dentists call their x-rays?
Tooth pics.
Tooth Pics
Explanation
Explain Bear
Hey, numbskull! The joke is a pun. Dentists take X-rays of your chompers, right? And they're calling them "tooth pics" which sounds like "toothpicks". Get it? Tooth... picks? This joke is probably the reason why your dentist is so rich. Dentists make a killing off of people like you who don't floss!