Roof Arc Angle Acetabular Fracture

Roof arc angle angle between vertical line through femoral head and line through fracture helps to define fracture pattern stability considered stable if the fracture line exits outside the weight bearing dome of the acetabulum.

Roof arc angle acetabular fracture.

Transverse acetabular fractures involve a single fracture line which crosses the acetabulum through both posterior and anterior columns. For surgically treated fractures with residual steps and diastases after operation the correlation between steps and 2 year outcome was good. Acetabular fracture involves whether superior articular weight bearing area and stability of the hip are assessed by acetabular roof arc angles comprising medial anterior and posterior. The medial roof arc angle was 46 6 3 degrees anterior roof arc angle was 52 7 0 degrees and posterior roof arc angle was 62 degrees 8 5 degrees.

Such fractures divide the acetabulum into an upper portion ilium with the roof and a lower portion ischium and pubis. Acetabular fracture displacement and roof arc angles converted into a roof arc score were assessed and correlated with clinical outcome at 2 years follow up. The medial roof arc angle was 46 6 3 anterior roof arc angle was 52 7 0 and posterior roof arc angle was 62 8 5.