Secure Screw Placement in Management of Acetabular Fractures Using the Suprapectineal Quadrilateral Buttress Plate

Figure 2

MPR of an acetabular fracture treated with a quadrilateral buttress plate. (a) A combination of inlet view (rotation by the angle α around the frontal axis (dotted line) in the sagittal plane) and (b) obturator view (rotation by the angle β around the sagittal axis (dotted line) in the axial plane) reconstructs (c) the plane P defined by the center of the femoral head (white dot) and the screw to be analyzed. This plane defines the real spatial orientation of the screw and the hip joint. (d) Detailed view of (c), the screw distance to the subchondral bone of the acetabulum (red to blue dot) was measured on a vertical line to the screw axis through the center of the femoral head. In (b), the white dotted line represents the virtual continuous acetabular subchondral bone in the lunate fossa.

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