According to the last research conducted by Health and Resources and Services Administration the average cost for tuition and fees for 4 years of dental school is about $100,000 and higher in private schools. A student graduating from dental school has about $120,000 to repay in school loans.he average dentist earns about $100,000 and for dentist specializing in a particular field they can make an average yearly income of about $200,000. Hence, a dental education is a wise enough investment on your part for your future career growth.