How many years of experience do you have?
The friend I referred to went to U of Pacific in SF/Sacramento...she came out $250k debt from undergrad + dental and is making 125k 1 year out of school.
So the average income out of college now is 41k w/ 27k in debt
http://money.cnn.com/2012/01/12/pf/college/salaries/index.htm
So the extra schooling cost another 225k or so, but you are getting 85k a year more than what you would have go straight out of college. I bet you can make up the income gap really quick, esp. in light of the fact that the real money comes when you open your own practice as a dentist. There are a few family friends that are dentists...trust me, none of them are starving.