When I asked my surgeon what could be the downside as I was making my decision for the TKR, he stated, and I quote: always a chance for an infection AND there could be some clicking. So clicking is to be expected (I have very little clicking) BUT the SOB NEVER SAID that I may have a numb foot for the rest of my life, I may have decided to not have it done. There should be no grinding on the knee you had fixed, that is why you got the TKR in the first place. After all this I wonder how people managed before TKR, they did, just wondering how they did it.