Abstract The aims of this study were to introduce a method to treat distal radius diaphyseal metaphyseal junction fractures by prebending an elastic intramedullary nail and to evaluate the factors influencing fracture apposition. Fifty-two consecutive patients (4 to 15 years old) with a distal radius diaphyseal metaphyseal junction fracture were included. The nail was inserted and advanced into the proximal radial fragment as normal. After bending the nail distally about 90° at the site predetermined to lie at the distal segment, the elastic intramedullary nail was advanced until the prebent part completely entered the marrow cavity. The fracture angular deformity was fully corrected in anterior-posterior and lateral views. The apposition rate was 90% to 100% in lateral view, >50% in anterior-posterior view. The operation time was 16.73 ± 6.253 minutes. The average time of fracture healing was 5 months (range, 4-7 months). During 12 to 19 months of follow-up, firm fracture healing and good remodeling were observed, and there was no impaired forearm rotation function or secondary fracture. Our study showed the treatment of distal radius diaphyseal metaphyseal junction fractures by prebent intramedullary nail could make up for the deficiency of Kirschner wires and steel plates and keep the fracture stable. Fracture type and the anatomical features of the distal radius were associated with fracture apposition.
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