Treatment of the unstable total knee arthroplasty.
Instability is one of the leading causes of clinical failure after total knee arthroplasty. Instability can be categorized according to three basic patterns: AP or flexion space instability, varus/valgus or extension space instability, and global instability. Surgical options for treating instability include polyethylene exchange of a modular component, revision to a more constrained component, or revision to a hinged component. The results achieved with these surgical options vary for each type of instability. In general, the use of more constrained components to manage unstable knees is favored.
McAuley
James P
JP
Anderson Orthopaedic Research Institute, Anderson Orthopaedic Clinic, Alexandria, Virginia, USA.
Engh
Gerard A
GA
Ammeen
Deborah J
DJ
D019645:Arthroplasty, Replacement, Knee; D006801:Humans; D007593:Joint Instability / Q000601:surgery*; D007719:Knee Joint; D011183:Postoperative Complications / Q000601:surgery*; D012086:Reoperation; D016896:Treatment Outcome