Journal of spinal disorders & techniques
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J Spinal Disord Tech · May 2011
Long-term follow-up of revision decompressive lumbar spinal surgery in elderly patients.
A retrospective study of elderly patients (more than 65 y of age) who underwent surgery for lumbar spinal stenosis between 1990 and 2000 was carried out. Among all these patients, the patients who underwent revision surgery were studied. ⋯ Even in reoperated elderly patients with spinal stenosis without spinal fusion, an improvement in functional status and somewhat in pain perception can be anticipated.
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J Spinal Disord Tech · May 2011
Randomized Controlled Trial Comparative StudyBiomechanical comparison of odontoid plate fixation versus odontoid screw fixation.
Randomized controlled trial with statistically significant difference or statistically no significant difference (Level I). ⋯ Plate fixation of the odontoid process for certain type II odontoid fracture patterns provided a significantly higher biomechanical stability than the technique of odontoid screw fixation. Using a specially designed plate construct fixed with 2 cancellous screws into the body of C2 and an additional cortical screw inserted in the odontoid process, 84% of the original stability of the intact odontoid was restored. Single- or double-screw fixation of the odontoid only restored approximately 50% of the original strength.
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J Spinal Disord Tech · May 2011
Trajectory of transsacral iliac screw for lumbopelvic fixation: a 3-dimensional computed tomography study.
A 3-dimensional multi detector computed tomography study. ⋯ The TSIS could be safely inserted without increasing the general risk of conventional iliac screw. On the basis of the result of this study, we consider the TSIS technique a useful option for lumbopelvic fixation to overcome disadvantages of iliac screw.
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J Spinal Disord Tech · May 2011
Postoperative spinal epidural hematoma after microscopic lumbar decompression: a prospective magnetic resonance imaging study in 89 patients.
A prospective case series. ⋯ The incidence of postoperative SEH after microscopic lumbar decompressive surgery was 14.6%. Postoperative SEH did not delay clinical improvements. Age 50 years old or more was strongly associated with the development of postoperative SEH.
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J Spinal Disord Tech · May 2011
Significance of angular mismatch between vertebral endplate and prosthetic endplate in lumbar total disc replacement.
A retrospective study. ⋯ Angular mismatch was more common in L5-S1 than in L4-5. L-TDR at the most lordotic level, L5-S1, and implantation of an upper prosthesis with a mismatched angle seem to be the causes of a reduced segmental ROM, increased segmental lordosis, and anterior malpositioning of the prosthesis. However, these changes do not affect the clinical outcomes of patients.