Hardly the case.
Here is an example at BU:
year1 year2 year3 year4
TUITION $39,510 $39,510 $39,510 $39,510
FEES* $2,608 $3,083 $3,583 $3,083
ROOM & BOARD $11,381 $10,782 $14,376 $13,378
BOOKS/SUPPLIES $2,734 $2,150 $580 $580
PERSONAL $2,527 $2,392 $3,192 $2,926
TRANSPORTATION $ 1,960 $2,108 $3,212 $3,861
TOTAL $60,720 $60,025 $64,453 $63,338
That's about $62,000-63,000 per year. That's about the same as the dental school tuition.
Also, dental students can start working right after school as general dentists and start paying for the loans while med students have to do residency!
In an interview at Arizona during the financial info presentation, they told us that dental students pay their loans much quicker and have less defaults then med schools students.
Just food for thought!