Yes. In my opinion, you have to study during your normal curriculum unless your school gives you a super long dedicated board prep period and you do crazy long days during that period. I recommend building it into your school year, though.
I basically did what I needed to for school (studied for the tests and quizzes when I needed to), but did nothing extra on the dental stuff. I completed all my projects during assigned lab times too - I never spent time outside of lab on that stuff. I dedicated my free time to CBSE prep. Mornings, evenings, and especially weekends. Most days I was up by 5/530 AM to start studying for about an hour or two before dental classes and most evenings it's what I was doing before bed around 10 PM or so. If I had free time between classes or during lunch time, I studied for the CBSE. I wasn't insane about it though - I rarely ever studied for more than ten hours per day, and even that was exceedingly rare. Some days were a couple hours, some were five, some were longer. I never missed a day though. I still exercised and did plenty of fun stuff too. If you start studying early enough, you make it a lot easier on yourself.
Like I said, if you make a plan, stick to it, and grind hard, you'll be fine.