I am 13 months post op from a left total knee revision surgery. The implant that was in was completely lose, it never grafted to the implant. This was done exactly 12 months from the initial replacement. I have had pain in the knee since surgery yet once again. Very frustrating. It has been injected, numbed up, scoped, x-rayed, all with negative results. My OS now is trying to decide what to do. He scheduled me for an MRI today and once I got there they were unable to perform this due to too much metal in the knee. I have very sharp stabbing pains after being on my feet a lot (like cleaning house all day, painting my house, shopping all day, etc.) This pain will just happen at no certain time and it is so sharp and so strong it stops me dead in my tracks. I do have swelling if I am on my feet a lot. I am so discouraged right now. I want this nightmare to be over. In my heart, I feel something isn't right. I have been through this four times now. both knees have been replaced twice! My right knee had bone that died away around the femur implant. My left was lose. Completely lose. This new knee is cemented in. Please if anyone can help shed some light? My OS thinks it is tissue related and won't even think dead bone, etc. He thinks neuroma. Help! Thank you, Susan P.S. I am only 43!