Where can I earn scholarship money for dental school?

I am only a freshman at an undergraduate college right now but I'm thinking ahead. I want to be an orthodontist someday. I picked out the dental school I want to go to. I picked UMKC Dental School. Since I live in Missouri the in state tuition is roughly $15,000 so i need about $60,000 in scholarship money because I am not very rich and I'm at a very good private institution called Buena Vista University. I will have a lot on my plate but I want a really good education. I got a scholarship here at BVU and grant money so that was helpful but I still am paying a lot of money. Where can I earn scholarship money so my bills don't stress me out?