Investigation of Revision Total Knee Arthroplasty

We performed 199 total knee arthroplasties (TKA) in 149 patients with rheumatoid arthritis and osteoarthritis from 1982 to 1994. From 1982 we used kinematic or mark 2 prostheses for TKA, KOM or KC-1 (ceramic type) from 1984, PCA from 1985, MG-1 from 1986 and PFC since 1992.We shidied 8 revision TKA (4%) performed in 8 patients with failed knees. The mean interval from initial to revision TKA was 5.8 years (range; 4.5 to 9.3 years). The most common reasons for failure were tibial component sinking due to technical failure, tibial component sinking due to bone weakness with RA, breakage of metal back patella component (MG-1) and loosening due to arthritis mutilans. When we used cementless porous coating total knee arthroplasty, more and more bone source was lost revision.