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Use of the Coventry infant hip screw in the treatment of nonunion of fractures of the distal humerus

¹ The Rowley Bristow Department of Orthopaedics and Trauma, St Peter’s Hospital, Guildford Road, Chertsey, Surrey KT16 0PZ, UK.

Correspondence should be sent to Mr R. B. Simonis.

Between 1993 and 2000 we treated 14 patients with nonunion of fractures of the distal humerus; 11 had already had previous fixation which had failed. The mean time to surgery was 21 months after injury. All the fractures were very low which made it difficult to obtain a firm hold of the small distal fragment. The problem of fixation was addressed by inserting a Coventry infant hip screw into the humeral condyles. The screw has a thread of wide diameter which gives excellent purchase on the small distal fragment. The condyles can then be compressed on to the humeral shaft using a 4.5 mm narrow tibial dynamic plate. Of these 14 difficult cases of nonunion, 12 progressed to union.