European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society
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Comparative Study Clinical Trial
Anterior cervical interbody fusion with the Zero-P spacer: mid-term results of two-level fusion.
Our aim was to compare the safety and efficacy of anterior cervical discectomy and fusion (ACDF) using the Zero-P spacer versus the plate method in patients with cervical spine spondylosis. ⋯ Clinical results with the Zero-P spacer used for two-level ACDF were satisfactory. The device is superior to the traditional plate for preventing postoperative dysphagia and avoiding possible complications associated with a plate. Prospective trials with more patients and longer follow-ups are required to confirm these observations.
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To make a preliminary classification of double-layer sign according to the morphological characteristics of the ossified and central hypodense mass and clarify implications of different patterns of "double-layer sign". ⋯ OPLL patients with double-layer sign of type C is almost inevitably followed by CSF leakage after anterior decompression. For type A and B, occurrence of CSF leakage is not as high as we thought before. Pattern of double-layer sign should be a considered factor when anterior or posterior approach is chosen.
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To investigate the differences between imaging features of spinal tuberculosis (TB) and metastatic cancer measured by dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI). The presentation of TB on convention MRI may not show the typical TB signs, and they may be mis-diagnosed as malignant diseases. DCE-MRI may provide additional information to help making differential diagnosis. ⋯ DCE-MRI may provide additional information for differentiation between spinal TB and metastasis, when their manifestations on conventional imaging were similar.
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In the scientific community, a scientist's productivity is usually measured by his scientific output. The productivity of a group, an institution or, on a larger scale, a country can be assessed in similar manner. This study aims to show the contribution of Chinese authors to orthopedics research, from three major regions, namely Mainland China, Taiwan, and Hong Kong. ⋯ The total number of orthopedics articles in China increased markedly from 2003 to 2012. Of the three regions, Mainland China published the most articles, clinical trials, randomized controlled trails, and case reports. In general, Spine was the most popular journal to choose in the three regions.
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A fabricated mesh cage and/or posterior occipitocervical instrumentation alone has been used for reconstruction of ventral defect of the upper cervical spine. However, using a trimmed mesh cage it was hard to achieve optimal clival screw purchase and it migrated or broke. A specific instrumentation at the craniovertebral junction (CVJ) should incorporate the morphology of the CVJ and biomechanical validation. The purpose of the present study was to develop an innovative clivus plate integrated with the clinical anatomy of CVJ and to evaluate the stability of the clivus plate fixation (CPF), stand-alone or combined with a posterior occipitocervical fixation (POCF). ⋯ This study demonstrated screw purchase in the adult clivus and developed an innovative clivus plate fixation for reconstructing an extensive ventral defect in the upper cervical spine. The clivus plate fixation combined a posterior instrumentation ensuring reliable upper cervical stability.