Figure 1: Knee Society Score (KSS) pre- and postoperatively for both the NexGen Full Flex and the Columbus Knee system differentiated in total knee score, knee score, and function score. Through a possible maximum range of flexion up to 155° knee score can reach a subtotal value of 106 points and total score up to 206 points (flexion 5° = 1 point: original score max 25 points, modified score of our study max score 31). *Significant.