Hello,
I qualified in 2015, so not sure if anything has changed since then? The Levisons book is great and has a website where you can test your knowledge. The Q&A for dental nurses book is also good way to test your knowledge, although, you may be tempted to memorise questions and answers, this won't be helpful to you if you don't understand the topic. I learn best one topic at a time.
It is also worth looking through your ROE.
Unfortunately, there are no shortcuts as we really do need to learn it all and keep up to date with it for the rest of out careers.
Hope that helps