Fig. 3.

The average clinical gap, defined as the measured joint gap minus the combined thickness of the tibial component and polyethylene insert, increases with knee flexion until 90° and then decreases with further flexion. There were statistical differences between the clinical gaps at all flexion angles: between 0° and 10°, 30°, 60°, 120° (p < 0.001); between 10° and 60° (p = 0.004); 90° (p < 0.001); between 30° and 90° (p = 0.017); 135° (p < 0.001); between 60° and 135° (p < 0.001); between 90° and 120° (p = 0.023); 135° (p < 0.001); and between 120° and 135° (p < 0.001).