I have bone on bone arthritis in my knee and Dr. said TKR is what is needed. I'm nervous after reading articles about blood clots, infections, etc. As of now, I use a cane to get around better and have tried cortisone shots. They have helped somewhat but wear off after a couple of months. I guess I'm looking for some guidance as to go ahead with surgery or not. I'm 75 and used to walk a lot. Can't manage much anymore. Any encouragement?