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

Figure 3

The “dangerous” fractures that exceed each classification’s particular zones. For example, 1-2 type fractures are vertical fractures that extend to the basal neck from the neck. 3-4 type fractures are equivalent to type 2 of the Evans classification; their instability is greater than general trochanteric fractures.