I am using the 2019 NDEB exam bank to study atm, lots of questions and repetitions and is very important to study.
As for resources, I found Dentist 2B and I think its great. New questions with similar concepts & Explanations. Slightly more challenging than the real exam but I like that cuz it helps me study.
Dental Decks is helpful as well just to clarify concepts, but can be a bit too much at times. Personally not recommending Mosby, not as relevant and too much detail.
Personally, I am using Dentist 2B, 2019 NDEB Exam bank, and glancing over decks.
Hope that helps! here are the links to exam bank and dentist 2b
https://ndeb-bned.ca/sites/ndeb/files/pdf/Resources/ndebreleasedquestions_2019_1.pdf
www.dentist2b.com
All the best