CT of acetabular fractures: analysis of fracture patterns

Thirty-one consecutive patients who sustained acetabular fracture or posterior femoral head dislocations were examined by computed tomography (CT). By analysis of closely spaced, thin CT images, it was possible to characterize the three-dimensional nature of these injuries. Traditional classification into anterior column, posterior column, and complex two-column fractures was facilitated. CT was especially useful in evaluation of the two-column fractures in which unique information concerning the configuration of the fracture, integrity of the acetabular dome and quadrilateral surface, and identification of the stable fragment was obtained. Surprisingly constant fracture patterns were identified. CT was also useful in determination of presence or absence of loose bodies in the joint and in evaluation of the femoral head and sacroiliac joint in all types of fracture.
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