Figure 12a. Interfragmentary screw. Mortise (a) and lateral (b) radiographs of the ankle show a low-contact DCP (note small indentations on the undersurface of the plate in the mortise projection) and five cortical screws that transfix a distal fibular shaft fracture. The third screw placed through the plate is obliquely oriented crossing the fracture site (interfragmentary screw). A fully threaded syndesmotic screw is also present.