We aimed to obtain anthropometric data on Korean
knees and to compare these with data on commonly available total
knee arthroplasties (TKAs). The dimensions of the femora and tibiae
of 1168 knees were measured intra-operatively. The femoral components
were found to show a tendency toward mediolateral (ML) under-coverage
in small femurs and ML overhang in the large femurs. The ML under-coverage
was most prominent for the small prostheses. The ML/anteroposterior
(ML/AP) ratio of Korean tibiae was greater than that of tibial components. This study shows that, for different reasons, current TKAs do
not provide a reasonable fit for small or large
Purpose: The purpose of the study is to measure the resected surface of femur of the Korean patients during total knee arthroplasty surgery and to compare these measurements with the dimensions of femoral implants in current use. Materials and Methods: Morphometric data (7 parameters) were obtained in 500 cases of resected femur of the Korean patients who underwent total knee arthroplasties, and these data were compared with four current implants designs. Results: The range of medial-lateral width at the given implant varies widely. The anterior width of the resected femur at the condyle is smaller than the widths of the most implants, creating an overhang. The medial-lateral width of the condyle at the level of transepicondylar line is wider than most of the present implants. However the widths of the resected posterior condyles were narrower at anterior-posterior alignment, causing overhang at the posterior condyles. We felt this will cause anterior tensioning at flexion and reduce the ability to flex further. Conclusion: The shape of the femur in
