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Fracture patterns and surgical outcomes of supracondylar humeral fractures in adolescents

摘要


Background: While supracondylar humeral fractures are the most common elbow fractures in children, the incidence in adolescents is much lower and related data are rare. Purpose: The purpose of this study was to evaluate the fracture patterns and surgical outcomes in adolescents with supracondylar humeral fractures. Methods: We retrospectively reviewed the medical records and radiographs of 37 adolescents (30 boys, 7 girls; mean age, 11.2 years) with supracondylar humeral fractures presenting between 2006 and 2013. In addition to the Gartland classification, we also identified the unique fracture subtypes as proposed by Bahk et al. in patients with extension-type supracondylar humeral fractures. Clinical outcomes were assessed using Flynn's criteria. Radiographic outcomes included the Baumann's angle and the lateral humerocapitellar angle. Results: Thirty (81.1%) were classified as extension-type fractures and 7 (18.9%) were classified as flexion-type fractures. According to the fracture subtypes proposed by Bahk et al., 6 adolescents (20%) were high fractures on the coronal plane. A complete union was achieved in all adolescents postoperatively. The mean elbow range of motion was 133.5° ± 14.5°. The clinical outcomes were excellent in 25 adolescents, good in 9, fair in 1, and poor in 2, using Flynn's criteria. The mean Baumann's angle and lateral humerocapitellar angle measured postoperatively were 64.8° ± 6.2° and 37.7° ± 11.7°, respectively. Conclusion: Adolescents with supracondylar humeral fractures had a greater incidence of flexion-type fractures and metaphyseal-diaphyseal junction fractures, and increased risk of union in valgus alignment was found. Thus, treating surgeons must be cautious in their approach to fracture reduction.

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