Central fractures of the acetabulum.

A series of 26 patients with central fractures of the acetabulum is presented with a follow-up of 3-13 years. Three patients had undisplaced fractures. In the remaining 23, long-term results of treatment by traction in 15 and by primary open reduction in 8 have been compared. A numerical grading system has been used for assessment. Results in the non-operative group were generally poor, only 2 being satisfactory. Some of the poorest scores in this group were associated with initial roof damage. Three patients required secondary salvage procedures because of severe pain and disability approximately 2 years after injury. Of the open reduction patients, all with roof damage, 4 had satisfactory results. Reasons for failure is the remaining 4 patients are discussed. Galloping degeneration due presumably to irreversible intra-articular cartilage damage at the initial injury, developed in 2 patients in the non-operative group and in one in the operative group.