I too suffer from osteoarthritis and am bone on bone in the right knee.  My right thigh is now 2 inches smaller than the left.  I had surgery 3 years ago and received Orthovisc gel post-op.  Even after 2 years of dedicated exercise I have not been able to even out my thighs.  I am back to bone on bone and in the process of getting the Orthovisc injections.  How did your legs do after your surgery?

I actually forgot I posted this question!  The surgery went well, however it is not a procedure for sissies!  I was 60 at the time of surgery.  My surgeon told me that after 60, the pain receptors weren't as acute, so pain would be minimal.  I guess my receptors didn't hear people singing Happy Birthday because it hurt like heck!  He told me later that I "didn't look 60 and it's the condition of the skin that indicates the condition of the receptors."  He could have told me that before he took a saw to me!!  Anyway, it was much harder than I'd been led to believe, so consequently I always thought I was behind the curve in recovery, which made me work all the harder.  When my surgeon saw me at 6 weeks he was amazed at my progress.  Doing the exercises the PT's give you is essential.  Even now, almost 8 months later I still tighten those quad muscles all the time.  I just measured my thighs and they are both equal.  One tip...my PT told me that rubbing the scar would help break up the scar tissue and lessen the scar.  Well, I would be sitting down and I would put the palm of my hand on my knee and rub the knee cap.  The scar on the knee cap is barely visible, but the portion of the scar on the top of the knee, going towards the thigh, where my palm was resting, is still very red and obvious.  I am rubbing the top of the scar like crazy now!  I am glad I had the surgery  now.  I learned to walk again without throwing my foot out.  My back has only acted up once, the pain down my left leg is totally gone and I no longer limp.  I still get stiff when I've been sitting too long, but that may be only old age creeping up on me!  And on the 4 month anniversary of the surgety I actually climbed Machu Picchu in Peru. When the surgeon saw the pictures at the 5 month followup, he just laughed and told me I was absolutely fine, and posted the picture for all to see!  If you go for the surgery, be aware it's a painful procedure and be prepared to do everything the tell you to do as far as PT goes, Work through the pain.  It will be worth it in the long run.