Fig. 2

Measurement of plate position and screw angle in the proximal fragment. a A posterior line (b) crossing the posterior cortex of the proximal tibia was drawn and a second line (a) parallel to the posterior line and crossing the anterior surface of the proximal tibia was drawn. Anteroposterior (AP) position of the plate was evaluated by calculating the ratio between the distance of the anterior line to the plate center (d) and distance of AP proximal tibia length (c) was measured from the posterior line (b) to the anterior line (a). The plate position on the axial CT image was represented as a percentile from 0 (anterior) to 100 (posterior). b Measurement of the plate position in the screw angle. (a) The angle between the proximal central screw and the posterior cortex line (b)