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[Arthrodesis following knee arthroplasty]
U Munzinger1, J Knessl, N Gschwend
1Klinik Wilhelm Schulthess, Zürich.
In 44 failed total arthroplasties of the knee joint, arthrodesis was attempted (1970-1986). The interval between implantation of the total knee arthroplasty and diagnosis of infection was more than 2 years on average. Removal of the arthroplasty and arthrodesis was performed about 1 year later. In 80% of the knees, compression arthrodesis using an AO plate was used 34 times, with solid fusion occurring after 6 months. External fixation was used in 10 patients; rate of solid fusion was only 60%. The reasons for delayed union or failure had to do with reduced bone stock in the metaphysis with poor bone quality, inadequate fixation, and uncontrolled infections.
In 44 failed total arthroplasties of the knee joint, arthrodesis was attempted (1970-1986). The interval between implantation of the total knee arthroplasty and diagnosis of infection was more than 2 years on average. Removal of the arthroplasty and arthrodesis was performed about 1 year later. In 80% of the knees, compression arthrodesis using an AO plate was used 34 times, with solid fusion occurring after 6 months. External fixation was used in 10 patients; rate of solid fusion was only 60%. The reasons for delayed union or failure had to do with reduced bone stock in the metaphysis with poor bone quality, inadequate fixation, and uncontrolled infections.