Two cases were treated by non-operative methods. One case was treated by open reduction and screw fixation. And other two cases were treated by closed intramedullary Ender nailing.

Prearthroplastic diagnosis was three cases of rheumatoid arthrltis, one degenerative arthritis and one tuberculous arthritis.

The average age was 49.8 years(range, 34 to 71) and all patients were female. The supracondylar fractures occured by fall down injury and those were not associated with other injury The average duration between total knee arthroplasty and fracture was 1 year 8 months(range 9 months to 3 year 9 months).

The average follow up period was 13 months(range, 6 months to 2 year 6 months).

Posttreatment angulation was 2.3 degrees in AP plane and 6.7 degrees in lateral plane.