i'm going to be honest with you here...those who are saying that your scores are competitive are either unaware of the kind of scores needed to get into dental school or are just trying to cut down the competition by telling you that you scores are great.
honest opinion? if you had a 3.8+ gpa, i would agree that you are safe and do not need to retake the exam. however, considering your GPA, I would definitely, strongly suggest you retake and shoot for 20+ if you want to have a good shot at getting in, especially at the more competitive schools. strong letters of rec and all that are great, but ultimately its your DAT scores and GPA that will get you the interview, and in your case both are average.
gluck 👍