Paragraph Number

188

FIG. 33A illustrates positions for the medial dwell point 2435 and lateral dwell point 2436 during flexion of a joint that includes the tibial insert 2910a with a femoral component 2401 and tibial baseplate component 2440 of a left knee. The medial dwell point 2435 and lateral dwell point 2436 translate and/or rotate during flexion. Due, at least in part, to the contour of the tibial articulation surface 2812, the lateral dwell point 2436 migrates anteriorly and outwardly and the medial dwell point 2435 migrates posteriorly and outwardly. In certain embodiments, this migration of the dwell points facilitates tibiofemoral rotation within the medial tibial compartment 2813 during flexion of the knee joint where the condition is a valgus knee joint and/or adjusts mediolateral stability during flexion of the knee joint where the condition is a varus knee joint. In one embodiment, the tibial articulation surface 2812 may increases constraint on a lateral collateral ligament of the knee joint and decreases tension on a medial collateral ligament of the knee joint.

Added by DJM 1 2022