Classification
Type I: Undisplaced fractures with less than 2 mm displacement of the fractured fragments
Type II: Two-part fractures
- IIA: Two-part transverse fractures
- IIB: Two-part spiral fractures with lesser trochanter attached to the proximal fragment
- IIC: Two-part spiral fractures with lesser trochanter attached to the distal fragment
Type III: Three-part fractures
- IIIA: Three-part spiral fractures in which the lesser trochanter is part of the third fragment, which has an inferior spike of varying length
- IIIB: Three-part spiral fractures of the proximal third of the femur, in which the third part is a butterfly fragment
Type IV: Comminuted fractures with four or more fragments
Type V: Subtrochanteric-intertrochanteric fractures, including any subtrochanteric fracture with extension through the greater trochanter.
Explanation
Classification based on the number of fragments and location and pattern of the fracture
Figures
Figure 1. Seinsheimer classification for subtrochanteric fractures
Reference(s)
Provide the citation for the landmark article and recent review articles describing the classification
