Sure you've got a shot, but unless you found the cure for cancer and have a 35 on your DAT, your file will pobably sit around on the bottom of some pile. I'm sure people have gotten in applying this late but remember AADSAS is slower than snot rolling up a hill and your chances are definately lower now than if you would have applied May/June. I'd say it's safe to say that most schools are getting ready to print off their first list of acceptance invites within the next couple o' weeks, therefore you are at a disadvantage. Good luck and may the force be with you.
By the way, welcome to SDN, home of all the over-analyzing ,freekin-out dental school-bound weirdos.