See Dental Pulse books are highly editorial i.e., in every edition some of the changes occur in the book which may or may not be fruitful for you. Now if you have done your preparation from the old book then its better to stick to that because if you will try to study from the new book in a short amount of time then all the new information you will read may mess up with the prepared ones.

**So I would recommend, if you really have a good amount of time then only go for the new book or else stick to the old one you have.

I hope this answer helps. All the very best for your future endeavors!