I would say internship is the best time to prepare for NEET MDS…
But do you actually feel that you can study whole BDS syllabus in just one year….IMPOSSIBLE
my point is that you should try to study the subjects thoroughly during four years of study and then in internship you can revise them easily…
The first book everyone buy is DENTAL PULSE
best thing about it is, it has subjectwise and topic wise distribution of questions and they are a bit easy so it keeps you motivated..
Spend maximum time solving this book. The strategy is to go through the topic from a standard book and then solve the questions for that topic. Even then if any question is struck note it separately and read that section again.