Journal of spinal disorders & techniques
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J Spinal Disord Tech · Apr 2014
Comparative StudyPedicle screws can be 4 times stronger than lateral mass screws for insertion in the midcervical spine: a biomechanical study on strength of fixation.
A biomechanical study. ⋯ Not forgetting the potential risks of inserting pedicle screws in cervical vertebrae, pedicle screws are a better biomechanical choice than lateral mass screws for cervical fixation at the levels C3 through to C6.
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J Spinal Disord Tech · Apr 2014
Does lumbar disk degeneration increase segmental mobility in vivo? Segmental motion analysis of the whole lumbar spine using kinetic MRI.
This is a retrospective analysis of lumbar segmental motion using Kinetic magnetic resonance imaging(KMRI). ⋯ In functional positions assessed utilizing weight bearing KMRI, segmental motion at levels with degenerated disks was decreased. The contribution of upper lumbar segments to the total lumbar motion was not smaller than that of the lower segments. The L5–S1 level showed the smallest ROM in lumbar motion.
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J Spinal Disord Tech · Apr 2014
The retrospective analysis of the effect of balloon kyphoplasty to the adjacent-segment fracture in 171 patients.
Analysis of the adjacent-segment fractures in 171 balloon kyphoplasty (BK)-performed patients. ⋯ If the patients experience severe or mild back pain with higher preoperative KA, especially in the first 2 months, then they deserve detailed radiologic examination. To avoid subsequent fracture in the same or adjacent level, vertebral body should be filled adequately and sagittal balance should be obtained with KA correction. BK alone did not influence the incidence of subsequent VCF.
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J Spinal Disord Tech · Apr 2014
A novel minimally invasive technique for the treatment of high-grade isthmic spondylolisthesis using a posterior transsacral rod.
Case report of 3 patients with high-grade isthmic spondylolisthesis treated using a novel minimally invasive technique using a posterior transsacral rod. ⋯ We have shown the technical feasibility of anterior and posterior fusion for severe L5-S1 spondylolisthesis using a minimally invasive percutaneous technique through a transsacral approach. The main advantage of a posterior transsacral axial rod fixation is that it creates a structurally sound anterior column support, thus eliminating the problems related to bone grafts and eliminating the complications associated with an anterior approach. Our preliminary results suggest that this technique is feasible and seems to be associated with favorable outcome, although larger studies are warranted to verify these findings.
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J Spinal Disord Tech · Apr 2014
Cervical laminectomy width and spinal cord drift are risk factors for postoperative C5 palsy.
Cervical laminectomy and fusion (CLF) is a treatment option for multilevel cervical spondylotic myelopathy. Postoperative C5 nerve palsy is a possible complication of CLF. It has been suggested that C5 nerve palsy may be due to posterior drift of the spinal cord related to a wide laminectomy trough. ⋯ A wider laminectomy at C5 was associated with an increased risk of postoperative C5 palsy. Increased preoperative spinal canal diameter is also associated with increased risk of C5 palsy. In addition, patients who experienced C5 nerve palsy had a significantly greater posterior spinal cord drift. Strategies to reduce postoperative laminectomy trough width and spinal cord drift may reduce the risk of postoperative C5 palsy.