My knees are the only things that don't hurt. I have not had much pain in them but I was just wondering if RA affects the joint. I had BTKR on Sept. 23, 2008. Today I could barely do PT and couldn't finish due to pain in my ankle from the RA. The therapist stretched my knees and my ROM was pretty good. 119 on the left and 109 on the right. My knees were extremely bad before the surgery and my right one had actually a crevice in the bone from the wear. MY RA is bad and I take injections, Methotrexate, Celebres and Sulfazalazine for it.