Well man, the reason I ask is to gauge motivation. As others have stated I believe it is possible however, it will take some work which may not be limited to attending a post-bacc/masters or some kind of the current course of action does not succeed.
Like anything in healthcare we must look at the risk/benefit ratio when making decisions as well as the chance of achieving these outcomes. In your current situation the risk is that you apply to 30 schools and lose money and time with no yield. The benefit/reward is that it is possible for you to get in during the following cycle. However given current trends in GPA/etc the chance of achieving the beneficial outcome is lower than incurring the consequence. So to be more comfortable with risk/benefit in this situation you'd probably want to optimize your standings in the form of increasing your GPA, killing the DAT, and increasing the subjective portions of your CV. However, since nothing is guaranteed even putting in all this extra work to optimize your GPA might not yield acceptance so you'll have lost time/money pursuing this route.
I guess what I'm trying to say is: "if this is truly your passion the above point is completely moot." However if you're applying for one of the several pragmatic reasons to enter dentistry you may want to consider the risk/benefits.
Finally, please don't be in a rush to apply and get in; 1 or 2 years extra before matriculating really is no big deal in the grand scheme of things. Enjoy life while you tune up that application so that once you start you'll go hard in the paint.