I was swimming in the ocean and my dentures fell out...
But it's okay, it was only in-sea-dental.
A lady walked into a dentist's office and exclaimed, "I don't know which is worse, having a root canal or having a baby!"
The dentist replied, "Well make up your mind, so I know how to tilt the chair."
What did the dentist call the x-ray he took of your mouth?
A tooth pic.