Mobile-bearing knee arthroplasty: rotation is our salvation!

Rotating-platform knee arthroplasties have enjoyed an outstanding clinical history since their introduction in 1978. Mechanical complications requiring further surgery have been identified and include loosening, bearing dislocation, bearing wear, and osteolysis. No structural, metallic failures were reported, although extreme bearing wear was noted to cause metal surface damage sufficient to require revision in isolated cases. Survivorship of primary LCS cemented rotating-platform knee arthroplasties using an endpoint of revision of any component for any reason was 97.7% at the 20-year interval. Survivorship of primary LCS cementless rotating-platform knee arthroplasties using the same endpoint was 98.3% at the 18-year interval.