Dental exams detect many serious health issues that the rest of us are unable to perceive; but many people don't go to the dentist regularly because they believe that their teeth look and feel OK. So the Canadian Dental Association created these three spots, in which the important message is concealed in the background of the action; only if you know what to look for is it revealed.

Cute puppies frolic in a park, but in the background the words Oral Cancer are depicted on a signpost; skateboarders perform tricks, while 'Gum Disease' is written in graffiti on a nearby wall, and an acrobat juggles, with the words 'Tooth Decay' engraved on a window behind him.