Journal of spinal disorders & techniques
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J Spinal Disord Tech · Jun 2010
The relationship of intrapsoas nerves during a transpsoas approach to the lumbar spine: anatomic study.
A cadaveric study. ⋯ This study suggests that the intrapsoas nerves are a safe distance from the radiographic center of the intervertebral disc in a majority of cases; however, anatomic variations in the location of these nerves place them at injury risk in a small number of cases. These results suggest that neural monitoring whereas traversing the psoas may be important to enhance the safety of the transpsoas approach. Care is particularly warranted at the L4-5 level.
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J Spinal Disord Tech · Jun 2010
Implant removal for the management of infection after instrumented spinal fusion.
We operated on 21 patients with a postoperative deep wound infection. All the patients underwent implant removal and wide debridement. One patient lost to follow-up was excluded. ⋯ Our results indicate that implant removal and wide debridement for postoperative infection after posterior instrumented spine fusion can provide satisfactory results and could be one treatment option. However, the collapse of the disc space, loss of normal lordosis, and pseudoarthrosis are inevitable in patients with early postoperative infection.
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J Spinal Disord Tech · May 2010
Etiology of cervical myelopathy induced by ossification of the posterior longitudinal ligament: determining the responsible level of OPLL myelopathy by correlating static compression and dynamic factors.
Retrospective study. ⋯ Cervical OPLL myelopathy is induced by static factors, dynamic factors, or a combination of both. The discriminate formula for symptomatic cervical OPLL myelopathy contains both ROM and SAC.
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J Spinal Disord Tech · May 2010
Comparative StudyBiomechanical comparison of transpedicular versus extrapedicular vertebroplasty using polymethylmethacrylate.
An in vitro biomechanical study using osteoporotic cadaveric vertebrae. ⋯ Both extrapedicular and transpedicular techniques increased strength but reduced stiffness compared with the intact condition. The extrapedicular technique achieved greater height restoration possibly attributed to its easier access to the fracture site. These biomechanical data provide useful information when selecting an approach for cement injection in vertebroplasty procedures.
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J Spinal Disord Tech · May 2010
Transpedicular bivertebrae wedge osteotomy and discectomy in lumbar spine for severe ankylosing spondylitis.
A prospective study was performed in 8 patients with severe ankylosing spondylitis. ⋯ In cases of severe ankylosing spondylitis kyphosis with chin-brow vertical angles beyond 90 degrees, a single stage transpedicular bivertebrae wedge osteotomy and discectomy is an effective corrected method of correction.