The cost of attaining a medical education has increased significantly in the last decade. The same is true for the other health professions of dentistry, optometry, podiatric and chiropractic medicine.
Dental education is very similar.
The topic of financial aid is a very large one and would take several more pages here to cover fully. For now, know that you should consider how you will finance your education at the same time of application. It may be a factor when you choose schools. Keep your credit in good standing now because loans will be a necessity for most everyone. If you would like to read more information about financing your professional education, both the Medical School Admission Requirements for United States and Canada and the Admission Requirements for United States and Canadian Dental Schools have comprehensive sections on this topic as well as scholarships, loans, and budgeting.