A new knee prosthesis with bisurface Femoral component made of zirconia-ceramics

摘要

To avoid fractures of alumina ceramics, we developed total knee prosthesis with zirconia ceramic femoral component designated bisurface knee prosthesis by the cooperation of Kyoto University and Kyocera Co. The bisurface knee prosthesis was designed in 1989 to improve knee flexion without affecting the durability of the prosthesis. The prosthesis has a unique ball-and-socket joint in the midposterior portion of the femoral and tibial components, which functions as a posterior stabilizing cam mechanism and causes femoral rollback.