@nme1985
I've had TKR on both knees, one turned out O.K., the other is still not right even with a revision.
I'd just like to address Doctor's diagnosis and opinions. My experience following eight years of seeing many different doctor's for my bad knee is that the more doctor's you see the more opinions you'll get. I'm convinced they perform surgical procedures as they are taught in medical school but if the surgery fails they grope for answers but ultimately you're on your own.
Best wishes on whatever you decide, and remember the success rate odds are in your favor.