Sam - I was only discussing this subject on AB a few days back. Anaesthetic injected by needle doesn't seem to work on me, so I always have intravenous sedation when I need dental treatment. First of all, let me tell you that it's a totally painless way of being treated! The needle in the arm is hardly felt - if at all, and although it's probably not meant to knock you out totally, it always happens with me! I believe that once you're sedated, they then administer anaesthetic in the usual way in any case. You'll need someone with you after you come round, as you might feel a bit wobbly, but this soon wears off. You don't have to be frightened at all - x