I came across this on YouTube, and I found it very interesting as I've imagined what it must be like for vets to try to examine chin teeth, and this allowed me to visualize it. It is a little graphic for those who like me may be a bit squeamish.
http://www.youtube.com/watch?v=7pvlqxU3HJ8
http://www.youtube.com/watch?v=7pvlqxU3HJ8