AAAAAhhhhhhhh....by non-traditional, you meant by a non-science major minority that had been out of the academia for awhile....
You see, there are many types of "non-traditional" applicants such as "minority" applicants (Afr. Amer., Amer. Indians, and Hispanics ONLY) and "physical challenged" applicants (deaf, handicapped, etc.), so that's is why I wondered what you meant by "non-traditional" applicant.
With your classification (if there's one), there are no dental schools that will prefer one way or the other. As long as you have a decent undergraduate GPA (3.2-3.4) and a competitive DAT score (19/19), you should get into a dental school, even at the east coast dental schools. Now if you have a >3.5 GPA and a 20/20 DAT, then you're guaranteed to be accepted to a dental school. In your case, since you undergraduate GPA is lower, hopefully you have a higher graduate GPA (your MBA GPA) to show for!
Now, if you're a one of three ethinic background as I have listed above or below, then you may have some advantage at majority of the dental schools since they all are trying to increase their class diversity by accepting minority applicants. Since you also have a graduate degree (your MBA), you're also a more attractive applicant to dental schools.
Again, applicants are considered minority are:
1) African Americans
2) American Indians
3) Hispanic/Spanish background
With your stats, educational and ethnic backgrounds, you shouldn't have too much trouble being accepted to a dental school. Also, doing well in your DAT will help also. Aim for 20s/20s!
Good luck and it's not too late to apply.