I'm looking at a knee replacement in the near future, would imagine I'll have to have it done before the first of the year. The cortisone shot is wearing off (lasted about 3 months) and I don't want to get to the point where my pain was as bad as it was before the shot...Doc said he'd give another shot but wouldn't last 1/2 as long, and won't give a third...interesting to hear everyone's journey with this!