Alright, I have to be honest with you here, so please see my comments as constructive criticism rather than insulting you. Thanks!
1) Your GPA: is not competitive enough. It is average/below average. You definitely need to improve your science GPA, take more science courses (upper division is better). A competitive GPA is anything 3.5 or above. However, this doesn't mean that people with 3.11 do not have a chance of getting accepted. There were people getting accepted with this GPA, but you might want to improve this GPA to gain more interview invitation and more chances of getting accepted.
2) Your DAT is way too low. The national average for last year was 17, meaning that if you received 17 on ALL sections of the DAT, you are an average applicant. However, this year the average is higher. Most people in this web will tell you that you want at least 18+ on all sections to be competitive. (Please check out the "rejection" threads to see some people with 18+ still get rejected. That will give you a sense of what the admission committe is looking for).
3) Retaking the DAT is a MUST for you. And you have to studied well, learn a good technique to memorize and also understand the material. Give yourself plenty of time to study
4) Adding more schools to your application WILL NOT help you right now, and only waste you your money. If no school (from 10 schools that you originally applied) have send you out an invitation by now, then you should take it as a negative sign. You applied early enough to receive at least 1 or 2 interviews by now. So my suggestion is to not add more schools, or you will go broke soon.
5) In conclusion, you should wait for the next cycle. Try to improve your GPA to atleast 3.3, do well on DAT and get 18+ on all sections, do participate in community services and volunteer in dental clinics, get great letter of recommendation, and apply earlier like you have done so this year, and you will be receiving good news.
I am sure someone up here will tell you that you have a chance, may be because they are being nice and do not want to hurt you, or maybe they know someone who get accepted with your score. BUT in my opinion, your chance is VERY slim. Again, don't take this as an insult but rather my honest opinion to help you. Good luck!!!