I had my Right TKR in Jan '08 and I'm still in pain. Both sides of my knee and behind my knee hurt constantly. At night I get sharp shooting pains that go from my knee into my hip...difficulty sleeping unless I take a pain pill. I did have a lot of trouble with the knee buckling, but over time it seems to have gotten better, maybe it was PT increasing the weight bearing excercises. How long do you have to wear the brace? My OS offered no answers/help, he will take an x-ray at my one year mark. If I know him , he'll say the knee is "perfect". Maybe so, but if I'm still in pain I'm going elsewhere for a second opinion.
Keep us up-dated and take care.