well for some reason Novocaine doesnt work on me so its either sleep time or gas time. hell last time i went in to get a crown put back on my tooth i didnt get anything cuz the procedure was going to take less than 10 minutes(BIG MISTAKE) but if it worries you that bad you should have got him to prescribe you some Valium to take before the procedure to aid in the not knowing of what is going on.