Why knees fail.
Successful revision knee arthroplasty requires an accurate understanding of the cause of failure. Because a differential diagnosis is necessary, 9 causes of failure are proposed: i) aseptic loosening with or without osteolysis or progression of arthritis in a unicondylar arthroplasty; ii) tibial femoral instability because of collateral ligament instability; iii) patellar complications and malrotation; iv) no diagnosis, the so-called mystery knee; v) structural failure of the implant; vi) sepsis; vii) extensor mechanism rupture; viii) stiffness; and ix) fracture. A revision surgery should correct shortcomings in the original arthroplasty and not simply restore a mechanical situation that has failed.
Center for Arthritis and Joint Replacement Surgery, University of Southern California, 1450 San Pablo Street, Suite 5100, Los Angeles, CA 90033, USA.
Kelly G
KG
Vince
D019645:Arthroplasty, Replacement, Knee; D006801:Humans; D007593:Joint Instability; D007719:Knee Joint; D007720:Knee Prosthesis; D011475:Prosthesis Failure; D012086:Reoperation