Tension-band wiring is the preferred method of treatment for olecranon fractures and is widely used throughout the world. This technique simply and effectively transforms the forces produced by the pulling of the triceps into forces causing compression of the fracture. Although the procedure is associated with a high union rate, the incidence of skin complications is also high. The most frequent complication is symptomatic prominence of the Kirschner wires (K-wires). The purpose of this retrospective study was to identify the optimal fixation of tension-band wiring in the treatment of olecranon fractures using biomechanical techniques. Sixty-two patients were divided into two groups: a bicortical Kirschner wire group and an intramedullary K-wire group. The migration rate of the K-wires and the union rate of fractured bone were measured in both groups. Achievement of radiographic union was similar in the two groups. However, the K-wire migration rate was higher in the intramedullary K-wire group than in the bicortical K-wire group. With appropriate surgical technique, the use of bicortical K-wires is biomechanically superior to the use of intramedullary K-wires in the treatment of olecranon fractures.
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