I have degrees in electrical engineering and computer science. I had no problem getting an interview. The EE and CS classes count towards science GPA. As long as you make good grades in the prereq classes and do well on the DAT there will be no problem. From what I have seen the schools like to have students with degrees other than Biology.
Interviewers will put you on the defensive a little more to make sure you're sure about dentistry, but if you can get past that I've been told it helps out by adding some diversity to a class.