I happened to have my head level with Bandit's when he started wheeking - the really loud kind of wheek - and you know what? I could see right into his mouth! If only you could train them to do a loud wheek on command, it would be a lot easier it inspect their back teeth. (normally you can't see the back teeth because the cheek pads are in the way). I didn't actually see the back teeth, as it was too dark in his mouth, but if I had a light on him I bet I would have seen them.