Of course there seems to be some scar tissue with any surgery but TKR seems to build quickly. I had TKR just over 2yrs ago , range of motion was not bad but very painful, did a revision 8 months ago, range of motion improved but pain remains the same. I am told it’s nerve damage that can come with any surgery. I have tried so many things now it’s down to having nerve stimulator placed in my quad to block pain. Having it done in January, I just want to take a walk. Not to much to ask. Keep the faith