Journal of spinal disorders & techniques
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J Spinal Disord Tech · Jun 2015
Comparative StudyComparison of navigated versus non-navigated pedicle screw placement in 260 patients and 1434 screws: screw accuracy, screw size, and the complexity of surgery.
Computer 3D navigation (3D NAV) techniques in spinal instrumentation can theoretically improve screw placement accuracy and reduce injury to critical neurovascular structures, especially in complex cases. In this series, we analyze the results of 3D NAV in pedicle screw placement accuracy, screw outer diameter, and case complexity in comparison with screws placed with conventional lateral fluoroscopy. ⋯ The use of 3D NAV was associated with improved screw placement accuracy, improved screw-to-pedicle diameter measurements, and was used in cases with a higher degree of surgical complexity. We conclude that 3D NAV is a valuable tool in current spinal instrumentation, especially for more complex surgeries.
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J Spinal Disord Tech · Jun 2015
X-Ray-based Kinematic Analysis of Cervical Spine According to Prosthesis Designs: Analysis of the Mobi C, Bryan, PCM, and Prestige LP.
A retrospective study. ⋯ These results suggest preservation of sagittal ROM and increased superior adjacent segment kinematics, regardless of prosthesis design. Devices with an unconstrained design may not be beneficial to adjacent segment kinematics compared with semiconstrained prostheses.
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J Spinal Disord Tech · Jun 2015
Prevalence of venous thromboembolic events after elective major thoracolumbar degenerative spine surgery.
A case-control study. ⋯ This case-control study of 5766 patients who underwent elective thoracolumbar degenerative spine surgery revealed a prevalence of VTE of 1.5%, with a prevalence of PE of 0.88% and DVT of 0.66%. Patients with increasingly extensive surgery had a higher risk of PE, specifically those undergoing fusion of ≥5 segments.
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J Spinal Disord Tech · Jun 2015
One-Stage Correction Surgery of Scoliosis Associated With Syringomyelia: Is it Safe to Leave Untreated a Syrinx Without Neurological Symptom?
Retrospective study. ⋯ For scoliosis patients associated with syringomyelia without neurological deficits, it might be safe and could be an option to leave a syrinx untreated before 1-stage correction surgery. Besides, a residual scoliosis was important to make sure the neural safety. The correction procedure during the surgery should be controlled by about 15 degrees or 50% more than on the bending film. Not placing the pedicle screw in the apical region was beneficial for controlling the correction rate.
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J Spinal Disord Tech · Jun 2015
Morphologic Changes in Contralateral Lumbar Foramen in Unilateral Cantilever Transforaminal Lumbar Interbody Fusion Using Kidney-type Intervertebral Spacers.
A retrospective study of 58 patients undergoing cantilever transforaminal lumbar interbody fusion (c-TLIF). ⋯ Lumbar foraminal dimensions on the side contralateral to spacer insertion increased significantly after c-TLIF, suggesting that c-TLIF enables indirect decompression of the contralateral nerve root. Although increase in posterior disk height was shown to be an important factor to increase contralateral foraminal size, segmental lordosis was a risk factor for a decrease in contralateral foraminal size.