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Nine patients with nonunited humeral shaft fractures were treated by open reduction and internal fixation with an inframedullary fibular bone graft and a compression plate. Fixation of the screws was enhanced by passing them through the fibula as well as the two humeral cortices (quadricortical fixation). Eight of the nine fractures united at an average of 3.5 months. Tests on cadaver bones showed that quadricortical fixation was asstrong asmethyhnethacrylate augmentation and significantly better than bicortical fixation.

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