Dental School is all loans through the Federal Government. There are no grants and nothing covered by schools unless you qualify for a scholarship from the school.
The Maximum you can borrow is the Tuition + Fees + Cost of living calculated by the dental schools minus your EFC.
Any remaining amount that you need to cover your expenses will have to come from either private loans/ family/ friends/ savings.
Essentially, you are going to end up paying the "sticker price" on way or another.