If you dont care which dental school you will end up, you have a chance at some of the lower ranked schools. If you want to go to UOP, UCLA, Harvard, you must retake.
You can apply with the scores you have now and study in the mean time and take the DAT again. It takes AADSAS over a month to mail your application out. If you do decide to take it over, study hard, everyday and make sure to focus on your weakest points. Also, write a letter to all your schools telling them that you are going to take the DAT again.