Hello @titia131, welcome to Connect. I think you may find the following discussion worth your time to read through as well. It is about infections and spacers for hip replacements and although that is not exactly what you are going through, I think there would be a lot of similarities in experience: https://connect.mayoclinic.org/discussion/what-kind-of-mobility-can-i-expect-with-an-antibiotic-spacer-in-my-hip/.

@titia131, from what I have read in the above discussion, many people had to wait until their physician was confident that the infection had cleared up before putting in the new joint. @lynettegable and @pamstravel talked about an infection above the knee and may be able to offer some more insight. Are you making any progress in your PT, even if it is slow? Did your surgeon give any hint about how long you would have to wait? If you don't mind answering, how are you getting along with the spacer knee?