Another point. These are only the basic science courses.
Many state universities and many good ones allow transfers from the community college system.
The University of Illinois and Georgia Tech for example, while too expensive for me out of state, both accepted me into ultra-competitive majors OUT-OF-STATE there (computer science back in 2001) and TRANSFERRED every single one of my CC classes, and I had a 4.0 there, along with a high school SAT score of 1410. And the U of I cs department has an average SAT score of entrance of 1400 and conducts undergrad admissions separately in their own department! Why did such good schools such as these transfer my CC courses with extremely difficult undergrads? These are basic courses general physics, general chemistry, calc II, III, dif eq. The real university classes are the upper-division courses. And in pre-dental curriculum, they would be physiology, biochemistry, histolgy, genetics, etc.
My opinion, if someone went to CC for the first two years and transferred to a four-year school, if they showed evidence of doing well in the upper division courses, that rely on knolwedge in these basic classes, and scored well on the DAT A.A. >=20 on all sections, what is the difference? They know the material and can do just as well as everyone else. A lot of learning is UP TO YOU, and NOT THE SCHOOL! In a big, prestigious university, the professors DO NOT CARE ABOUT TEACHING INTRODUCTORY COURSES THAT MUCH! They are involved in their research and would care more about the graduate courses anyway. It is UP TO YOU to learn the basic material. And in the intro courses such as bio I, II, physics I, II, o-chem I, II, gen chem I, II, THERE IS A WEALTH OF OUTSIDE BOOKS AND STUDY GUIDES JUST FOR THESE SUBJECTS! In an upper division course, there are likely to be less resources. At Johns Hopkins biology major, the intro courses do not even count toward the major until you start with organic chemistry. They assume that you most likely had AP credit.
So there you have it. Upper division courses should be looked at the most along with the DAT. And I believe that dental schools should weight the whole application, instead of being so narrow.
And again, my opinion, if someone did not do too well, in the intro courses in their first two years of college and was a science major and did extremely well in the upper division, and showed that they new the material via the DAT, they should be given an interview. Period.
By the way, in China, dental school is in a school of medicine, and the first year you start with upper division courses. The basic "college sciences" in the U.S. undergrad INCLUDING organic chemistry are taught in high school and tested on the college entrance exam