I was in the same boat man. I'm missing a bunch of teeth because mine were so long they started growing in to each other at the bottom and the pressure caused the tops of them to basically explode
When I got my wisdom teeth out they tried to do it without putting me under and he was reefing so hard on my teeth that he was yanking me out of the chair. Needless to say they decided I had to be put under and I had to come back a couple days later.
When they finally did take them out the assholes only did two of them instead of the 4 they were supposed to. They told my doctor that I said I only wanted two out. I suspect it was so much of a fucking hassle that they didn't want to do them all.
Ensure is actually pretty good stuff so thats not so bad.