Hi Im Margaret, Im 65yrs old and I now have bone on bone knee arthritis. I find it hard to walk and now have a limp. its making me feel very old. i got a cortosone injection last week into the knee but so far nothing has changed. Hopefull with time, the surgeon said about 6 weeks, so I have to wait.I am new to this post and was wondering what you all think of knee replacements and if any of you have had one or a bad experience with one.