Colleen, As I am all too familiar with the road to recovery because of my mcl tear/subsequent surgery, I'm sure your post op recovery will take time. May I remind yuo that patience is a virtue. As far as a tkr after a patellectomy, I am not personally familiar, but I did find an informative scholarly article on the subject matter. I hope yuo find this helpful: http://www.pajot.eg.net/pdf/f1_2002/f1adb3.PDF. Best of luck, and hang in there!