im a 48 yr old female,5ft8in,160lbs.i have had numerous back fusions,neck fusions,r hip replacement it popped out 3 times so had a revison on it .had total l knee rplcmnt 14 mo. ago .surgeon said my knee is very loose because of all the ligaments and that is causing my severe pain/buckling but he left it at that he did take fluid to check for infection neg. also have swelling in knee. all the revision topics talk about mechanical failure what about ligaments thank you