Mesiodens,
Great question, I'm surprised this doesn't come up more often on SDN, there must be other people in similar situations.
Don't listen to the others here. You should be fine being #2. #1 is usually better, but some schools like #2 better because #1 is often too much of a cut-throat gunner. Just be glad you're not #3! Make sure you apply to a lot of schools though, just to be sure.
You're hurting on research though. I would recommend you write something up and written up and published before your interviews. I would recommend Cell, Nature, or Science. If you don't think it will get accepted, go for AJO-DO.
Remember, orthodontics is the most common specialty. There are more orthodontists than any other specialty, and it's been around the longest. Plenty of people make it in every year, so don't stress too much.
Good luck!