Paragraph Number

145

The medial posterior section 2822 may include the medial ramp 2838, which may begin at the medial high point 2827 and extend away from the medial high point 2827 anteriorly toward the medial low point 2828. Following the surface topography of the medial ramp 2838, the medial articulation surface 2820 tends to have a gradient from the medial high point 2827 toward the medial low point 2828 near the medial anterior section 2823 and to the medial perimeter 2826. The gradient of the lateral articulation surface 2821 flows to the lateral low point 2831. Therefore, movement down gradients on the medial articulation surface 2820 and lateral articulation surface 2821 may be asymmetric. The lateral articulation surface 2821 may be generally concave toward the lateral low point 2831. The location of the medial low point 2828 may cause the directionality of the gradient from the medial ramp 2838 along the medial articulation surface 2820, which causes an object or a mass to move down the gradient in the direction created by the medial ramp 2838. The medial ramp 2838 and the different heights along the medial perimeter 2826 and the medial articulation surface 2820 may create a medial dwell point 2835 that is transient along the gradient. The approximate gradients within medial tibial compartment 2813 and/or lateral tibial compartment 2814 are represented by dashed lines in FIG. 28F.

Added by DJM 1 2022