Mismatch in Size between Femoral and Tibial Components of the Total Knee Arthroplasty

Abstract

In total knee arthroplasty (TKA), measurements during pre-operative planning or in intra-operative decision-making dictate a mismatch in the size between the femoral and tibial components. This is because most total knee systems are designed to fit a Caucasian population. We evaluated the mismatch rate of 50 knees in which TKA was performed from 1991 to 1994 and compared the ratio of medial-lateral to anterior-posterior dimensions (aspect ratio) of the distal femur and the proximal tibia in these 50 cases as well as 9 templates of a total knee system. The femoral aspect ratio was significantly less in the templates than in achial cases and this in formation may be useful developing future Asian sized knee prostheses.