I hope this information is helpful. Good luck dealing with what I know is a difficult situation. Let us know if you have additional questions.
Richard Graves, DPM
My primary focus is on conditions of the foot, but I do help my patients to address certain types of knee pain as it relates to the alignment of the lower extremity. It sounds like your knee situation is a bit more complex and chronic than that. It also sounds like you've already seen an orthopedist (or two or three!).
I would suggest getting at least another opinion or two from the top knee replacement specialists in your area. Ask them if there is arthritis in your knee that is severe enough to warrant a knee replacement. Also, ask them the chances of achieving at least temporary relief from hyaluronidase injections or even PRP or amniotic membrane injections.
I hope that's helpful!
Dr. Richard Graves