I have had a total knee replacement in my right knee, 3 yrs ago & it's been totally successful... no regrets. My left knee is now giving me fits & is painful to walk (I love walking 2-3 miles a day). I had a cortisone injection a week ago and it's not helping at all I don't think. Most of my pain is on the lower right side & below my knee cap (different from my right knee, which was pain just about all over). My doctor will no doubt recommend Orthovisc injections next. Before I had my right knee replaced I went thru the Synvisc injections, and they didn't help... consequently, I had the surgery. Anyone find that Orthovisc works better than Synvisc?