DISTAL HUMERAL FRACTURE NON-UNION, REVISION OPEN REDUCTION AND INTERNAL FIXATION

Abstract

This paper reports our experience of revision open reduction, internal fixation and bone grafting of distal humeral fracture non-unions and in addition looks specifically at factors that may predispose to the development of non-union.

Between 1993 and 2003 18 patients with distal humeral fracture non-unions underwent revision surgery with bone grafting and rigid internal fixation. Two patients were lost to follow-up leaving a study group of 16 patients.

The patients’ age, sex, mechanism of injury, AO classification of the initial fracture and the primary treatment method were analysed with respect to possible factors predisposing to non-union.

All revision procedures were performed by the senior author. The non-union site was debrided, bone grafted and rigidly internally fixed.

Clinical assessment was performed using the Mayo Elbow Performance Score and radiographs were reviewed for evidence of bony union.

The Mayo elbow performance scores were excellent in 11, good in 2, fair in 2 and poor in 1.

Our results indicate that age, sex and mechanism of injury are not important in the development of non-union. Twelve patients (75%) however were considered to have undergone inadequate management of the original fracture.

Our experience would suggest that to reduce the risk of non-union following distal humeral fractures appropriate consideration must be given to the established and well proven surgical techniques.

If adequate fixation is considered beyond the experience of the treating surgeon we would strongly advise referral to a specialist unit.