Have you had a total knee replacement(TKR)? What is your experience with it? I'm interested in knowing about your post-op treatment and pain, the healing and physical therapy, and the long-term results. One doctor tells me that the TKR can be done only once or twice, while another states it can be done multiple times. Is there anyone whose TKR has lasted beyond the 12-15 year expectation. I've had physical therapy, athroscopy and physical therapy with limited success. I've had my third injection of Hyalgen-also limited improvement. Does anyone know about the success of Synvisc? I'm 53 and am trying to avoid a TKR. I'd appreciate your feedback!