Spine
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Retrospective single-center consecutive case series with two [corrected] year follow-up. ⋯ Kyphoplasty markedly improves clinical outcome [corrected] and results in significant vertebral height restoration and normalization of morphologic shape indices [corrected] that remain stable for at least two [corrected] years following treatment.
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Seventeen healthy volunteers were subjected to right and left lateral impacts 5.0, 6.8, 9.2, and 16.8 m/s acceleration while positioned in a Volvo car seat with lap and shoulder seat belt restraint in laboratory setting. ⋯ Compared with previously reported impact studies with a 5-point harness and rigid seat, the use of a 3-point lap and shoulder seat belt with car seat does not appear to adversely affect the cervical muscle response. In very-low- and low-velocity impact experiments, seat belt and seat type may thus not be particularly relevant to cervical EMG and kinematics.
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A retrospective review. ⋯ Harvesting cancellous autograft anteriorly from the lumbar spine using a trephine technique appears to be safe and reliable, with satisfactory fusion rates. Iliac crest graft harvesting with its attendant morbidity is avoided.
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A reliability study was conducted. ⋯ The ossification-kyphosis angle in the sagittal view of MRI has potential as an indicator of the effectiveness of posterior decompression in this disease. It is thought that there is a critical point of posterior decompression at nearly 23 degrees of the ossification-kyphosis angle of the decompression site. When the ossification-kyphosis angle is more than 20 degrees , the presence of echo free space should be carefully confirmed in intraoperative ultrasonography.
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MR imaging and multiplanar reconstruction were used to evaluate relative length of the spinal cord to the vertebral column in adolescent idiopathic scoliosis (AIS). ⋯ There was significantly reduced spinal cord to vertebral column ratios in the AIS patients with severe curve, suggesting a disproportional growth between the skeletal and the neural systems. The relative shortening and functional tethering of spinal cord may play an important role in the etiopathogenesis of AIS.