What are some basic requirements to get accepted into NYU?

They require a diploma or GED and SAT or ACT scores. They will ask for unweighted GPA on a 4.0 scale (since every high school has their own system, weighted GPAs are meaningless). Most people who get in had a GPA over 3.75. Also, dentistry is a professional program you do after college, not in college. You'll need pre-dental classes, which most schools offer.