Page 19 - Demo

1Introduction17The geometry of the tibial plateau can theoretically also contribute to the range of tibial rotation. As the lateral compartment of the knee is the more mobile part of the joint, a steeper slope of the lateral compartment may be related to a greater range of tibial rotation. During a bending motion of the knee, the lateral femoral condyle slides from a central position on the tibia in extension to a far posterior position on the tibia in flexion, whereas on the medial side of the knee this is present to a much lesser extent. The latter is due to restrictions based on the geometry of the medial compartment where the medial femoral condyle is concave and the medial tibial plateau is convex, as illustrated in Figure 4. Figure 4. Schematic representation of the anatomic difference between the medial (left side) and lateral (right side) compartments of the knee in relation to the convexity of the tibial plateau. This physiological difference between the medial and lateral compartments induces a natural rotatory movement in the knee during flexion and extension. If there is a steeper posterior tibial slope in the lateral compartment compared to the medial compartment, this rotational movement may be increased. It is still unknown to what extent these anatomical features relate to range of tibial rotation.Mark Zee.indd 17 03-01-2024 08:56