Abstract
We evaluated anatomical variations of the tibia measuring two indices. The first index was the difference between the central line of the tibial shaft and the center of the proximal tibia. The second index was the difference between the tibial tubercle rotational angle and the malleolar line angle relative to the most posterior edge of teh medial and lateral femoral condyle. In total knee arthropalsty, variations may affect the rotational and/or varus/valgus position of the tibial component, especially when the proximal tibia is cut with a posterior slope. It is recommended that the operative technique be modified according to the variation of the tibial configuration.
