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Table 1 Brumback Classification system for hip dislocation and femoral head fracture

From: Femoral neck fracture combined with anterior dislocation of the femoral head: injury mechanism and proposed novel classification

Type I FRACTURE OF INFEROMEDIAL ASPECT OF FEMORAL HEAD
A Minimal or no acetabular fracture, stable hip joint
B Relevant acetabular fracture, unstable hip joint
Type II FRACTURE OF SUPEROMEDIAL ASPECT OF FEMORAL HEAD
A Minimal or no acetabular fracture, stable hip joint
B Relevant acetabular fracture, unstable hip joint
Type III HIP DISLOCATION WITH FEMORAL NECK FRACTURE
A No femoral head fracture associated
B Femoral head fracture associated
Type IV ANTERIOR HIP DISLOCATION WITH FEMORAL HEAD FRACTURE
A Indentation type
B Transchondral shear type
Type V CENTRAL HIP DISLOCATION WITH FEMORAL HEAD FRACTURE