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Humeral shaft butterfly fractures managed with intramedullary nail: could the third fragment features predict the
G Vicenti1, D Bizzoca1, M Carrozzo1
1School of Medicine, University of Bari "Aldo Moro"- AOU Consorziale "Policlinico" - Department of Basic Medical Sciences, Neuroscience and Sense Organs; Orthopaedic & Trauma Unit, Bari, Italy.
Abstract:
To assess the impact of the radiological features of the third fragment on the outcome of humeral shaft fractures type 12-B managed with endomedullary nails. We retrospectively evaluated a series of 80 patients, divided into 3 groups, according to the fracture healing time: within 6 months (group-A), between 6 and 12 months (group-B) or fracture non-union after 12 months (group-C). In 26 patients out of 80 the fracture healing was observed at 6 months follow-up; in 47 out of 80 at 12 months after trauma and in 7 out of 80 no fracture healing was observed at 12 months follow-up. Regression analysis showed that the third fragment displacement and angulation are the most important features that affect the fracture healing. The mean third fragment dislocation (cut-off: 12 mm) is the main parameter to influence the fracture healing within or in more than six months.
