Be TRUE to your teeth...
Or they will be FALSE to you!
What did the dinosaur eat after the dentist pulled his tooth?
A bear without any teeth is a GUMMY BEAR.
"I came in to make an appointment with the dentist," said the man to the receptionist.
"I'm sorry sir," she replied. "He's out right now, but..."
"Thank you," interrupted the obviously nervous prospective patient. "When will he be out again?"