They don't... have dentists? Isn't it a common sort of thing?

"What a peculiar school," he offers. "They dealt with their ailments some other way?"

Magic, perhaps, since they were all mages by the sound of it? Wrathion may not be exposed to all the fine details of the world at large, but it sounds like he has reached the low bar of 'better than the people at Hermione's school'. He'll take that victory.