Fig. 6.

The length of the superficial MCL (sMCL) is represented as function of the ROM. Length changes were calculated based on the geometric model. The black line represents the isometric superficial MCL in the native knee. The effect of raising the joint line 4 mm and using a 4-mm smaller component is shown by the blue line. Slackening in the mid-flexion range and progressive lengthening in deeper flexion are seen. Slackening in the mid-flexion range and progressive lengthening in deeper flexion are seen. JL = joint line.