I had a TKR 2 years ago and now experiencing really bad pain. Ortho took many X-rays and felt my knee and said I have a “loose knee” and probably will need to have the spacer changed from a 12 to a 16 (?????) he gave me a series of muscle strengthening exercises to do daily to see if it helps as I am averse to surgery and to let him know how I am progressing. Until 2 months ago the replacement was perfect - not a single issue . I’m so bummed . If only replacing the spacer is the recovery much less than TKR ?