The Dr.s sometime take no responsibility or level with you. Scar tissue is the big excuse as to why you are in pain at kneecap caused by “fibroblasts”. If you are quote”an excessive generator of scar tissue” you are sunk on improving ROM. I’m supposedly one of this lucky ones. I don’t have a pain in kneecap on right TKR. Go figure? I’ve had TKR/Revision/MUA and ROMNOF 73 after last 50 PT session’s . I know this doesn’t help but is one case history.