I had my left knee replacement 7 years ago. It is still swollen and painful. Had a second opinion and was told that 20% of knee replacements do not take and I am one of those.. I am in late stage 4 of CKD so I believe that no surgeon would operate on my knee now. All I can say, do your exercises before and after and you will be fine also check out your surgeon. Make sure you are comfortable with him/her,