I want to point out that the Dental Decks (at least when I was in school a few years ago) are just a bunch of flash cards put together by two dentists. The old released exams that you can get from the ADA (I think) or NBDE are simply put into flash card format. The guys that write the dental decks do not have any more insight than you or me as far as what will be on the exam. They are just playing on the fact that while questions are different every year, the topics remain the same. I studied both the dental decks and the old tests and figured this out.