Yeah, I’m one of those people! I went to the most experienced TKR surgeon in our area. Then about 10 weeks after surgery, everything changed. The x-rays always “looked normal” in my surgeons opinion. After 8 months now, I can barely walk 25’ and my knee is clunky, and standing for more than 10 minutes kills me. After, 3 opinions from “out of network” TKR Surgeons, everyone says: “Revision” due to “Mid Flexion Instability”. I’m livid! I’m posturing for a revision, but have obstacles with Health Insurance until Nov (when I turn 65). I live in Central Florida and would love to hear revision success stories from people that have experienced the same problem after TKR. Thanks!