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A COMPARISON OF THE OUTCOME OF SURGICAL TREATMENT OF TILE TYPE B AND TILE TYPE C PELVIC FRACTURES



Abstract

Introduction: Surgical treatment of unstable fractures of the pelvic ring is a well established technique both to stabilise the ring and reduce bleeding and to facilitate healing in an anatomic position and thereby facilitate rehabilitation. While the pathoanatomic differences between vertically and rotationally unstable fractures are well known, the purpose of this paper is to highlight the difference in expected outcome for these two injuries.

Objective: To review the clinical and radiological outcome following operative treatment of unstable fractures of the pelvic ring and compare the outcome for type B and type C injuries.

Design: Retrospective study of patients treated consecutively with review of initial admission notes and clinical and radiological follow-up.

Patients: From January 1988 to July 1997, one hundred and sixteen patients were treated with traumatic disruption of the pelvic ring. Of these, ninety-five with type B or C fractures required definitive surgical stabilisation of their injuries, forty-five with Tile type B fractures and fifty with Tile type C fractures. There were sixty-three males and thirty-two females with an average age of thirty-three years.

Intervention: All patients had operative treatment for definitive management of pelvic ring disruptions.

Outcome measures: All patients were reviewed clinically and radiologically at a mean of fifty one months. Clinical review consisted of assessment of persistent pain, ability to ambulate, ability to return to work, clinical evidence of persistent instability of mal union. Radiological review was for evidence for mal union or non union.

Results: At final review (mean fifty-one months) ninety-one patients were independently mobile. Of the four patients who required a stick or crutch, two had type B2.1 fractures and two had type C1.3 fractures. Three of these patients had associated acetabular fractures and this may have been contributory.

Sixty patients were completely pain free at follow up. Seventeen patients complained of occasional mild pain after exercise but did not require analgesia. Eleven patients had moderate pain that occasionally required analgesia. Seven patients had severe causalgic type pain, all of who had had evidence of nerve injury at presentation. Only type C fractures with neurologic deficit at presentation had severe pain at follow up. Overall the incidence of pelvic pain, both anterior and posterior, was significantly higher in type C fractures.

There were three non unions, all in type C fractures and one of these required surgery. There were fourteen mal unions, nine leg length discrepancies in type C fractures and five patients with a significant internal rotation deformity of greater than 15° in type B fractures.

Conclusions: The outcome of surgical treatment of unstable pelvic fractures is worse following vertically and rotationally unstable fractures (type C) than after fractures that are only rotationally unstable (type B). This is valuable information when considering the prognosis for these injuries.

The abstracts were prepared by Mr Ray Moran. Correspondence should be addressed to him at Irish Orthopaedic Associaton, Secretariat, c/o Cappagh National Orthopaedic Hospital, Finglas, Dublin 11.