I have long contested the stats on successful TKR and listen to the argument that you'll only hear from those that were unsuccessful. Having been exposed to statistics, probabilities, and bell curves during my academic years, my story goes like this: I have a grouping of fourteen fellow retirees on email from my former employer that have had TKR, both successful and unsuccessful. The unsuccessful count is 9 with most of the common complaints, mainly pain and stiffness, and 5 claiming success. During the months and years of communications with the successfull TKR recipients it's come to my attention that they call a success when they have less or no pain, even though they may still have stiffness and less ROM. My question is "what is success?" If you can read anger between the lines it's because prior to my first surgery 7 years ago I had just completed a deck that required going up and down a ladder, and now I can no longer take my wife out dancing.