What's the undergraduate major that would prepare you the most for dental school?

I am currently a Psychology undergrad major because I find studying the human thought is interesting. However, I find science, especially biology and chemistry, as much interesting. I would like to know what major will prepare me the most for the courses in dental school and whether it makes a significant-enough difference/advantage for dental school to major in Biology instead. I searched a lot and looked into multiple threads, and many people said that majoring in Biology can help because... What's the undergraduate major that would prepare you the most for dental school?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums