Hi I have sat the Dental nurse exam twice now. The first in 1990 and recently this month. Honestly I would not spend too much time trying to learn this. The Questions that appear on the exam are mainly things you will be familiar with. Do try and have an understanding of the nerve supply for local anaesthetics there were a few of these on the multiple choice art of the exam. Hope this helps and all the very best for you exam. Regards Therese.