Journal of spinal disorders & techniques
-
J Spinal Disord Tech · May 2014
Case ReportsRadiologic evaluation after posterior instrumented surgery for thoracic ossification of the posterior longitudinal ligament: union between rostral and caudal ossifications.
Retrospective clinical study. ⋯ All patients needing surgery had discontinuity across the disk space between the rostral and caudal ossified lesions as seen on CT. This discontinuity was considered to be the main reason for the myelopathy because a high-intensity area on magnetic resonance imaging was seen in 18 of 19 patients at the same level. Rigid fixation with instrumentation may allow the discontinuous segments to connect in patients without a concomitant thickening of the OPLL.
-
J Spinal Disord Tech · May 2014
Surgical treatment of scoliosis in osteogenesis imperfecta with cement-augmented pedicle screw instrumentation.
A retrospective study. ⋯ Pedicle screw instrumentation in OI scoliosis is safe and effective. Cement augmentation in these patients may help to increase the pedicle pull-out strength and decrease the screw failure rates, especially at the proximal and the distal ends of instrumentation.
-
J Spinal Disord Tech · May 2014
Analysis of cervical pedicle with reconstructed computed tomography imaging in Korean population: feasibility and surgical anatomy.
We analyzed the anatomy of C3-C6 cervical pedicles with reconstructed computed tomography images. ⋯ Because of a tight safe margin, to reduce pedicle penetration the screw should be inserted along the pedicle. With regard to SA, C3 and C4 have a risk of upper end plate penetration. However, C5 and C6 have a risk of facet joint violation, which needs C4 and C5 inferior articular process removal for screw placement. The entry point at C3 and C4 is near one third of the lateral mass height from the posterior border of the superior articular process at the posterolateral border of the lateral mass. The entry point at C5 is near the posterolateral border of the superior articular process and that at C6 is superior to the posterior border of the superior articular process at a line medial to the posterolateral border of the C5 lateral mass. During insertion, not only CA but even SA should be considered carefully to reduce pedicle penetration.
-
J Spinal Disord Tech · Apr 2014
Risk factors for adjacent segment disease after posterior lumbar interbody fusion and efficacy of simultaneous decompression surgery for symptomatic adjacent segment disease.
A retrospective study. ⋯ Patients whose facet joint at the adjacent segment had a more sagittal orientation had postoperative anterior listhesis, which caused symptomatic ASD. Simultaneous decompression surgery without fusion at the adjacent level was not effective for these patients, but rather, there was a possibility that it induced symptomatic ASD.
-
J Spinal Disord Tech · Apr 2014
Usefulness of an early MRI-based classification system for predicting vertebral collapse and pseudoarthrosis after osteoporotic vertebral fractures.
Retrospective review. ⋯ Our results suggest that the radiologic prognosis can be estimated to a limited extent by determining the degree and extent of osteoporotic vertebral fractures using an early magnetic resonance imaging-based classification.