Spine
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Comparative Study
Traumatic instabilities of the cervical spine caused by high-speed axial compression in a human model. An in vitro biomechanical study.
Traumatic injury of the cervical spine was produced on human cadavers and evaluated with instability tests and radiographs. ⋯ The injury patterns of the cervical spine were associated with impact energy, and a high level of impact energy could produce either three-column injury or anterior middle-column injury. Instabilities of the cervical spine caused by compressive trauma increased with the level of impact energy. The neutral zone was more sensitive than the range of motion in representing spinal instability, whereas instability testing was more sensitive than radiographs in evaluating traumatic injury of cervical spine.
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Comparative Study
Biomechanical analysis of anterior versus circumferential spinal reconstruction for various anatomic stages of tumor lesions.
Spinal reconstruction procedures for metastasis evaluated biomechanically using human cadaver specimens. ⋯ For corpectomy or subtotal spondylectomy, anterior reconstruction alone can provide stiffness equivalent to circumferential reconstruction. However, total spondylectomy significantly reduces the anterior reconstruction stiffness, suggesting the need for combined anterior and posterior procedures.