What happens during a trip to the dentist? (Digital Dental Depositary)

It's Professor Hallux's uncle Halitosis' hundredth birthday - and in his honour Hallux is creating a pop-up Digital Dental Depositary – an Oral Health Helpdesk if you like.  He's going to see how many questions all about teeth he can answer against the clock. 

PROFESSOR HALLUX’S DIGITAL DENTAL DEPOSITARY – WITH SUPPORT FROM PHILIPS SONICARE