Hello, Thanks to you & others for the very kind comments! BTW, I was surprised to hear I am allergic to the cement since I am allergic to nothing else. Very frustrating. re: My ortho surgeons - TKR #1 & #2 was same surgeon, when #2 failed he referred me to a Surgeon in the same practice who specialized in Press-Fit joints, when that one failed, he referred me to a surgeon at a different practice who specializes in "Problem Knee Joints". No one has told me why the prev joints failed. I was told the 1st 2 had fractured because of my allergy. I'm not sure why the joint would fracture if the cement broke down. #4 will likely fail soon, it's been 3 years which is the longest any have lasted. Still not ready to lose my leg and will talk to another ortho surgeon for his opinion. The fun never ends. I wish you well when getting help for your knee - don't be afraid to get another opinion, but in the end there are no guarantees. BTW, I keep getting told there is only one cement available (or containing the same ingredient that I am allergic to). Take care -