Journal of spinal disorders & techniques
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J Spinal Disord Tech · Jul 2009
Diagnostic features of sciatica without lumbar nerve root compression.
Retrospective case series review of patients showing sciatica without radiographic evidence of nerve root compression. ⋯ Piriformis syndrome and gynecologic conditions account for most cases of extralumbar spinal sciatica. Female sex, right side involvement, and overlapping sensory disturbance are suggestive of extralumbar spinal sciatica associated with gynecologic conditions.
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J Spinal Disord Tech · Jul 2009
Timing of vertebral registration in three-dimensional, fluoroscopy-based, image-guided spinal surgery.
The timing of vertebral registration using isocentric fluoroscopy was recorded in 20 consecutive patients undergoing image-guided spinal surgery. ⋯ The use of the isocentric C-arm for vertebral registration in image-guided spinal surgery can be performed in an efficient manner. In this study, multiple vertebral levels of registration could be accomplished in less than 9 minutes with minimal to no radiation exposure to the surgeon and operating room personnel.
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J Spinal Disord Tech · Jun 2009
Randomized Controlled TrialCoronal and sagittal plane correction in patients with Lenke 1 adolescent idiopathic scoliosis: a comparison of consecutive versus interval pedicle screw placement.
Prospective clinical study. ⋯ Interval pedicle screw placement constructs seem to be equally effective as consecutive constructs for facilitating curve correction in patients with Lenke 1 AIS.
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J Spinal Disord Tech · Jun 2009
Clinical TrialAnatomic determination of optimal entry point and direction for C1 lateral mass screw placement.
Anatomic study of C1 osteology using computerized tomography. ⋯ C1 lateral mass screws are best placed beneath the posterior arch, parallel with the arch in the sagittal plan. The entry point is the medial border of the neural arch at its junction with the lateral mass. Straight ahead screw direction is safe in the axial plane, but up to 20 degrees of medial angulation will increase the safety margin from the vertebral artery foramen, and this technique avoids vertebral artery damage and optimizes lateral mass screw purchase. We suggest that this is the preferred method of entry into the lateral mass of C1.