I am 15 months out from a right TKR....it's still so sore and stiff by early afternoon. Although I do lots of walking and most everything, ROM is about 105 and 121 with a therapy band I totally understand. My ortho says Xray looks good but why am I still sore and stiff. Now the top of the knee hurts sometimes. I also want a CT or a MRI to see why because I'm doing all the therapy, stretching etc... yet it's still sore and stiff. I feel it's affecting my lower back more and by evening my feet are tingling. I don't know it it's from the back or the knee or both. Frustrated to say the least. I hope that you get some answers soon and I'd seek out another Dr. I have not done this as of yet. I am also going to PT soon or my lower back. I get more help from my NP than I do the orthopedic Dr.