Knee arthrodesis for failed total knee arthroplasty.

The use of arthrodesis to salvage failed total knee arthroplasty is reviewed in nine patients. Prosthetic failure was due to infection in six cases, aseptic loosening in two cases, and instability in one case. The techniques of arthrodesis included six Hoffman external fixators, two fluted intramedullary rods (3M-Orthopedic Products Division, St Paul), and one pulsing electromagnetic field stimulator. Arthrodesis was successful in eight of nine patients, averaging 5.4 months to union. All eight patients resumed a painfree functional level of activity. Meticulous surgical technique and appropriate method of arthrodesis are emphasized.