Evans developed a classification of trochanteric fractures of the proximal femur.
Parameters:
(1) type of fracture
(2) stability after reduction (considered stable if there is overlap of the inner cortical buttress)
Type of Fracture
Stability
Term
undisplaced
NA
Type 1, stable
displaced
stable after reduction
Type 1, stable
displaced
unreduced or unstable after reduction
Type 1, unstable
comminuted
NA
Type 1, unstable
reverse obliquity
NA
Type 2, unstable
where:
• The reverse obliquity fracture is a transverse fracture with the medial end at the lower trochanter. The Type 1 fractures follow the intertrochanteric line.
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