Transverse fractures of the acetabulum

From a total case material of 356 fractures of the acetabulum we have been able to analyse in depth 188 fractures treated surgically--77 transverse, 21 T-fractures and 90 transverse associated with posterior rim fractures. These lesions, although sharing certain anatomical and radiographic features, have peculiar characteristics which are important to define for purposes of treatment. Posterior dislocation of the femoral head is frequently associated with posterior rim fractures and central dislocation with transverse and T-fractures. Traumatic arthritis as a late complication was studied with particular reference to the quality of reduction of the fracture. When this results in an irregular articular surface early arthritis is the usual outcome; when it results in an acetabular cavity wider than the diameter of the femoral head, arthritis is delayed usually for more than 10 years, and subsequently progresses very slowly.