The Reliability of Classifications of Proximal Femoral Fractures with 3-Dimensional Computed Tomography: The New Concept of Comprehensive Classification

Figure 1

The boundary lines that separate areas in “area classification.” In “area classification,” the proximal femur is divided into 4 areas with 3 boundary lines; Line-1 is the center of the neck, Line-2 is the border between the neck and the trochanteric zone, and Line-3 is the line that links the inferior borders of the greater and lesser trochanters.