What do you do?

tell the intern to do all the work.

I wouldn't be able to do anything.... Kog would eat me first.

He has no teeth... he has a tongue though

X-ray him from far, FAR away. or just look at his teeth during his joke.

quit.

Hug him. Then probably get eaten, OR if it goes right

Hug him. He probably opens mouth because of food. then look at teeth. then Die

Beg Singed to help me. He likes acid and weird monsters, right? He's pals with Warwick after all.

Change shifts with Nurse Akali.

Stab his gums with my equipment and then tell him it's his fault he's bleeding; that it's a result of him not flossing enough.

My experience with dental professionals would indicate that such is the correct way to be a dentist.