64640x2. I get both sides. I've only done this once, but it worked very well. Used a technique on this board in another thread. Patient had continued coccydynia despite conservative treatment. Impar steroid was ineffective, coccyx intraarticular helps for a few months only.
On a related note, how do you RF the impar? Do you just punch through the ligament/joint or do you wrap around somehow? Seems to me bowel injury is a high risk and I'm not a fan of chemical ablation.