Hi, I have just found your interesting and very helpful site. I wonder if anyone else has the same problem as me? Had my TKR nearly 4 years ago now and I am still having problems. I can't kneel (had my other knee replaced 18 months ago) and have great pain when standing still in my left knee. The surgeon thought I could have impingeing ?? it seems to go very stiff and feels weird and then I have to go through painful movement to get it going again. It's hard to explain. I think my Hubby thinks I'm going potty.... I still take diclofenac and paracetamols as I'm allergic to Tramadol and Morphine..