in all honesty the possible out come of that would be slim to nothing like 1 in 20 million people are affected in any way under a tooth surgery, you have nothing to worry about, they use a vary easy and un-hurtful procedure that will have no affect the drug they use to put you under is a vary simple drug thats a laughy gas that makes you sleep, it wears off withing in 8-12 hours and you will be fine, hopefully this makes you more secure aboutt he procedure and i hope everything gets resolved :)
