Journal of spinal disorders & techniques
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J Spinal Disord Tech · Aug 2007
Clinical TrialMultislice CT fluoroscopy-assisted cervical transforaminal injection of steroids: technical note.
A prospective study of 19 consecutive patients who underwent multislice computed tomography (CT)-guided cervical transforaminal steroid injection. ⋯ The multislice CT fluoroscopy-guided approach is feasible and a safe and effective approach for cervical transforaminal steroid injection. With the advantages of safety for the patient and precise placement of the needle for injection, this technique might be an additional option and may eventually replace the conventional C-arm fluoroscopy-guided cervical transforaminal steroid injection technique.
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J Spinal Disord Tech · Aug 2007
Comparative StudyComparative biomechanical analysis of an improved novel pedicle screw with sheath and bone cement.
A human cadaveric biomechanical study of fixation strength of an improved novel pedicle screw (NPS) with cement and a conventional screw. ⋯ The NPS showed a significantly higher mechanical strength than the control screw in both pull-out tests and cyclic loading tests. The NPS showed more than adequate strength without cement leakage.
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J Spinal Disord Tech · Aug 2007
Clinical TrialSagittal alignment of the subaxial cervical spine after C1-C2 transarticular screw fixation in rheumatoid arthritis.
Several articles reported the association between the development of subaxial kyphosis and the hyperlordotic fixation of C1-C2. However, their patients were heterogeneous in both primary disease and operative procedure. Transarticular screw fixation has become a popular procedure for C1-C2 arthrodesis instead of wiring techniques in which C1-C2 is difficult to fix in the intended alignment. ⋯ Neurologic deterioration recurred in 4 patients, because of the postoperative development of subaxial subluxation. Common radiographic changes included an increase in C1-C2 lordosis, constant inclination of C1, an anterior shift of C2, and a decrease in C2-C7 lordosis. Many factors, not only C1-C2 angle, are associated with subaxial sagittal alignment change after C1-C2 transarticular screw fixation.
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J Spinal Disord Tech · Aug 2007
Unilateral cervical facet fractures with subluxation: injury patterns and treatment.
This is a retrospective study of patients with unilateral cervical facet fractures from a Level I academic trauma center. ⋯ We conclude the following: (a) anterior discectomy and fusion with a static (constrained) plating system is appropriate treatment for this type of injury, (b) in the absence of significant neurologic deficit with residual canal or foraminal stenosis, preoperative closed reduction is not necessary, (c) a small percentage of these patients will have vertebral artery injury, thus warranting screening with 16-slice computed tomographic angiography.