Nope. A friend of mine has a 19AA/19TS (none below 18) and has two interviews! Also, I looked through the interview thread, and this person had a 19/18, this person had a 19/20 but a low subsection score, this person and this one both had a 20/19, this person and this person both had a 19/19, and this person had an 18/20 with two low subsection scores, yet alllllll of these people received at least one interview, if not more!
It took a long time to find those, but they are there! Don't lose hope just yet! Good luck 🙂
PS: The average AA for applicants that matriculate into dental school is about 20.4 (as of 2016). This is not necessarily the average of those that interview nor get accepted.