Brumback Classification of Femoral Head Fractures

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Type 1: posterior hip dislocation with fracture of femoral head involving inferomedial (non weight bearing) portion of femoral head.

• Type 1A, with minimal or no fracture of acetabular rim and stable hip joint after reduction.
• Type 1B, with significant acetabular fracture and hip joint instability.

Type 2: posterior hip dislocation with fracture of femoral head involving superomedial (weight bearing) portion of femoral head.

• Type 2A, with minimal or no fracture of acetabular rim and stable hip joint after reduction.
• Type 2B, with significant acetabular fracture and hip joint instability

Type 3: dislocation of hip (unspecified direction) with femoral neck fracture.

• Type 3A, without fracture of femoral head.
• Type 3B, with fracture of femoral head.

Type 4: anterior dislocation of hip with fracture of femoral head.

• Type 4A, indentation type, depression of superolateral surface of femoral head.
• Type 4B, shear type, depression of superolateral surface of femoral head.

Type 5: central fracture-dislocation of hip with femoral head fracture.

Ref:
Brumback RJ, Kenzora JE, Levitt LE, et al. Proceedings of the hip society, 1986. St. Louis: CV Mosby; 1987. p. 181–206