Good Luck. I hope your leg is able to get stronger so your pain subsides. Have you tried any type of viscosupplementation? It is also another thing you can try to help reduce your OA pain .
An update... its been two weeks since my cortisone shot and my knee is still much improved. It was almost 100% pain free (but still felt unstable) the first week--and this week I have a small amount of discomfort but it's totally tolerable. My Mobic also seems to be more effective now that the inflammation has been calmed, and seems to be maintaining. One thing that I did notice--how much the pain had limited me without really knowing it--suddenly I am doing more yard and house work, playing more with the kids I see as a therapist and walking like a normal person again! I now feel very hopeful that the Synvisc injectins might have a real chance to work since I experienced so much relief.
Cortisone and Synvisc injections are two totally different things. I got no relief from either one and I would not recommend Synvisc to anyone. From what I've read, the majority of people get no benefit. Either way the results will be temporary. I once had a cortisone injection in my shoulder that lasted three weeks. That's the most relief I've ever gotten. I had a PKR back in December and for the first time in about 30 years I have no pain during the day and only minor pain and stiffness at night.