oh I already decided I'm going for the root canal retreatment. It is the most work but the least invasive and least risky. I have a lot of confidence in my dentist, and I remember how rushed he was to do that root canal. My roots are very long and very narrow, and I think he was convinced he couldn't get further down that root. But I have had additional treatment done (before the crown was finalized) on a couple of other teeth, and it is worth a go. Because oral surgery IS a risk, and I have broken jaw joints, so the less extreme the procedure is... the better.