Ortho Board Prep
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Grasp the Biomechanics of IM: Essential Insights for Exams
Updated: Feb 2026
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Key Medical Takeaway
In this comprehensive guide, we discuss everything you need to know about Grasp the Biomechanics of IM: Essential Insights for Exams. The biomechanics of IM nails define working length as the unsupported portion of the nail spanning the fracture site, from its proximal to distal fixation points. This length carries the majority of the load. Crucially, a shorter working length significantly increases both the bending and torsional rigidity of the intramedullary nail, ensuring stronger fixation across the fracture.
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