Thought I needed one for same reason, after DDS, Endo, Oral Surgeon and Perio exams ( no one could determine for sure if it was an infection or a fractured root) turns out I did not need the Apio, but had a flap proceedeure done to actually look at my root to determine if fractured, and it was. So, I lost my root, $700 crown, and now need either a bridge or an implant...about $3500-4,000!

So much for the WDW trip.
I am also a HUGE chicken/Baby. I needed to be able to drive and had kids to worry about so could not get completely knocked out. I had a 10 mg valium (should've had 20 mg) a boatload of the long acting novacaine, my Dean Martin CD and this act of GENIOUS by the perio...he covered my eyes during the proceedure! This was the best thing ever, no light in my eyes, no seeing the tools pass by, no worries about making a face or wincing (which I did not need to do, it was comletely painfree, and he was digging as my root had fractured in 7 places) and to be honest, I was glad I was coherent as I was ablr to request dissolving stitches ( to me, having stitches removed is just as painful as anything else) and I did not lose the rest of my day, and it was NO WHERE NEAR as awful as I thought. I had been a wreck for 3 weeks while I shuffled between doctors trying to determine if I was going to lose the tooth or not, no one wanted to make a mistake and take it out if not sure.
Anyway, at the time when I thought I needed the Apio, the Endo said it would take about 20 minutes, eat soft foods for a while ( so make that jello, get yogurt, have eggs n the house) and all would be fine. I sure wish that was the outcome, would've been better than losing the tooth! However...so use the eye-cocer idea, bring a scarf of your own if you'd likee...I am telling you, I will request this for cleanings even!
Good luck, you will be fine, have them numb your gums with gel before the novacaine injections...anothe fab invention!
Pam