If you’re in Canada, I don’t know if this would be helpful information for you: two of my friends had kneecap replacement surgery, one in Edmonton, and another in Vancouver. Both found the post-op very painful and took months of rehab before they were able to walk. Both were not able to recover full use of those knees: every time they walked, they experienced a lot of pain. Both of them were also waiting for surgery to be done on the second knee.
After the first surgery, my friend in Edmonton decided not to go ahead with the second one, figuring if she did so, her knee would be worse off than it was now with the bone-on-bone pain. She now walks with a cane when she is able to walk at all.
For my second friend in Vancouver, my mother referred her to a hospital in Taiwan that would do the surgery and have her walking by the next day. She spent about $10,000 CAD, had the surgery done and sure enough, was walking the next day, with hardly any pain. She asked them if they could redo the first knee to make it better, unfortunately, they said no.
That was about four years ago, and she now walks fine without pain on that knee, though the first one still requires her to support herself with a cane.
Of course, not all knee surgeries go bad, but I hear too many horror stories here in Canada, whereasTaiwan is well known in Asia for both Chinese and western medicine. They book you in, process the payments, you stay there for about 3 days, and during those 3 days, you make arrangements for someone to bring food to you (many hospitals in Asia do not offer meals during your stay). If you can afford it, I would recommend it.
Best wishes.