Spine
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A conceptual study of the influence of the geometry of an articulated disc prosthesis at the cervical level using a 3-dimensional nonlinear finite element model. ⋯ Our data estimate the influence of the geometrical parameters of a ball-and-socket total disc replacement on kinematics and constraints at the cervical functional spinal unit. Under the experimental conditions, the facet forces were kept below their normal range in the case of the posterior center and a large radius.
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Prospective clinical series. ⋯ Lumbar decompression surgery results in a 58% incidence of asymptomatic compressive postoperative epidural hematoma. Adjacent level compression by hematoma occurs in 28% of patients. Advanced age, multilevel procedures, and international normalized ratio are independently associated with postoperative hematoma volume.
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Circumspinal decompression with dekyphosis stabilization was prospectively performed with thoracic myelopathy due to ossification of posterior longitudinal ligament (OPLL). Neurologic outcome was reviewed. ⋯ The OPLL plaque in the thoracic spine might be most easily, safely, and completely removed or floated, and the spinal cord is circumferentially decompressed through circumspinal decompression with dekyphosis stabilization.
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This study investigated the clinical usefulness of motor-evoked potentials (MEPs) produced by transcranial magnetic stimulation of the brain for cervical myelopathy patients. ⋯ In patients with cervical myelopathy, the CMCT significantly correlated with the results of clinical assessment. These findings regarding the duration of CMCT may be useful parameters in spinal pathology for prediction of the outcome of surgical treatment.