When I was graduating from undergrad, this was in my mind.
What if I don't get in? should I take some more classes to show that
I am not stopping my education and increase my GPA? or do that in grad school
and also think about the back up plan as well?
If I do post bacc + master then in case I fail to get in to dental school, I can start a new career as soon as I finish masters. Post bacc counts as the 1st yr of master so u can just do 1 yr post bacc + 1 yr master without accelerated masters' program.
Post bacc is supposed to be very hard so expecting higher GPA from post bacc is not easy.
I think it's better to take upper sci classes in undergrad to inc GPA than doing that in post bacc unless back up plan is in ur mind.