To study the clinical results of AO type C pelvic ring injuries and identify the prognostic factors.

25 patients were treated for C type pelvic ring fractures between January 1995 and August 2002. The injury mechanism, associated injuries, time from injury to surgery, ICU care, Injury Severity Score, fracture site of posterior ring, displacement, surgical method, and complications were analyzed. Radiological and clinical evaluations of the results were conducted using the Majeed's score. Of the 25 patients, 16 were male, 9 were female, with an average age of 41.6 years. All except one patient had associated injuries and 12 patients had neurological complications. There were 17, 7 and 1 case of C1, C2 and C3 type injuries respectively. Twenty three cases underwent surgical treatment.

The average Majeed's score was 66.6 points, and 15 patients (60%) had good or excellent results. The complications included 3 cases of non-union and 1 case of SI joint infection were complications. The clinical results were worse in those patients with neurological symptoms.

Satisfactory results were obtained after surgical treatment of C type pelvic ring injuries. Neurological injuries affected the clinical outcome and appropriate fixation of the anterior ring was needed for stable fixation of C type pelvic ring injuries.