The value of computerized tomography in fractures of the pelvic ring. 
Thirty four fractures of the pelvic ring were examined by computerized tomography and the findings compared with those obtained with conventional radiography.  CT scanning enabled precise delineation of the fracture sites in the posterior ring.  A new classification is proposed which defines five patterns of fracture of the posterior ring.  Computerized tomography is a valuable aid in planning operation in these injuries.