A few years ago, I, too, was told that I would need a knee replacement in the future. Thankfully, I've done very well, without any shots or anything. But a friend of mine just had surgery about 3 weeks ago, the last ditch effort to prevent her from having a total knee replacement. She had a Unispacer placed in her knee; it takes the place of the cartilage which was gone. She had gone through the session of three shots, to no avail. At any rate, you may want to look into this if the shots do not help you. All doctors do not perform the unispacer surgery, and it, too, is very painful, like the total knee replacement. Good luck to you, though!