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OUTCOME USING SPRING PLATES FOR POSTERIOR WALL ACETABULAR FRACTURES



Abstract

Introduction: Posterior wall acetabular fractures are potentially difficult fractures to treat due to difficulties associated with the types of approach, reduction and fixation required. Spring plates are a method of maintaining such fractures reduced.

Aims: To assess the clinical and radiological outcome with spring plate fixation of posterior wall fractures.

Materials and Methods: From July 1993 to August 2004, 91 patients with 92 displaced posterior wall fractures underwent posterior wall fixation with one or more spring plates.

All patients were assessed postoperatively with a CT scan and annually for up to 5 years for a clinical and radiological assessment. Clinically patients were graded according to the Epstein modification of Merle D’Aubigne/ Postel Hip Score. The radiographs were graded using the Roentographic Grade criteria used by Matta.

Results: Patients were reviewed at a mean 44 month follow up.

At the time of operation 40% of fractures were reduced anatomically. There were 12 post operative complications.

Clinically excellent or good results were seen in 70% and radiologically in 68%. There were 11 revisions for osteonecrosis, infection and osteoarthritis.

There was a high correlation between the accuracy of the reduction and the subsequent prognosis.

Conclusion: Posterior wall fractures can be treated successfully by the use of spring plates. Clinical results correspond closely with radiological appearance. The accuracy of reduction correlates highly with the subsequent prognosis and we recommend routine postoperative CT scanning to identify misplaced metalwork and the accuracy of reduction to help predict prognosis.

Correspondence should be addressed to Ms Larissa Welti, Scientific Secretary, EFORT Central Office, Technoparkstrasse 1, CH-8005 Zürich, Switzerland