Abstract
Total knee arthroplasty is indicated for the treatment of osteoarthritis. The number of operated cases is increasing, and we report our experience with failed total knee prostheses. We had 9 failed total knee joints, of which 3 were Porous coated anatomic (PCA) type, 2 were Miller-Galante (MG) type. 3 were unicompartmental (UKA), and 1 was the Kinematic type. Failure included patellar subluxation, patellar fracture, and tibial subsidence with loosening in the PCA prostheses; instability and patellar subluxation with metallosis in the MG prostheses; loosening and dislodgement of the component in UKA and deep infection in a Kinematic prosthesis. Some failures after TKA might result from inappropriate component designs and/or inadequate surgical techniques.
