D H Silcox

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STUDY DESIGN Biomechanical comparison of the pull-out strengths of lateral mass and pedicle screws in the human cervical spine. Measurements of pedicle dimensions and orientation were compiled. OBJECTIVES To determine if transpedicular screws provide greater pull-out resistance than lateral mass screws and to investigate the anatomic feasibility of(More)
Forty-four patients who had had a total of forty-seven amputations of an upper extremity and who had had a myoelectric prosthesis for more than two years were evaluated retrospectively for the amount of use of the prosthesis, the use of any other prosthesis, and the demographic factors that might be related to use of the prosthesis. The average duration of(More)
STUDY DESIGN An animal model of posterior lateral intertransverse process fusion healing in the face of systemic nicotine. OBJECTIVES To evaluate the effect of systemic nicotine on the success of spinal fusion and its effect on the biomechanic properties of a healing spinal fusion in an animal model. SUMMARY OF BACKGROUND DATA Clinical observations(More)
STUDY DESIGN Independent evaluation of 18 patients with multilevel cervical spondylotic myelopathy who underwent threadwire T-saw laminoplasty. OBJECTIVES Assess the efficacy of midline T-saw laminoplasty in non-Japanese patients based on clinical and radiographic criteria. SUMMARY OF BACKGROUND DATA Spinous process-splitting laminoplasty has been well(More)
STUDY DESIGN The effect on spinal fusion of an osteoinductive bone protein extract in the presence of a known inhibitor of spinal fusion (systemic nicotine) was studied prospectively in an animal model of posterolateral lumbar fusion. OBJECTIVES To evaluate the ability of a bovine-derived osteoinductive bone protein extract to overcome the inhibitory(More)
STUDY DESIGN Eight volunteers underwent magnetic resonance imaging scans of their lumbar spines to determine diurnal variations in the scan results. OBJECTIVES Magnetic resonance imaging of the lumbar spine typically is obtained under the assumption that results are not influenced by the time of day the scan is performed. To validate this assumption,(More)
We tested the hypothesis that the visual interpretation of magnetic resonance imaging (MRI) scans of the asymptomatic lumbar spine are affected by diurnal changes in fluid exchange in the intervertebral discs. Ten male subjects carried a 20-kg backpack in the intervening 3-h period between two MRI scans of the lumbar spine. After the subjects arrived at the(More)
  • D H Silcox
  • 1998
Studies that show laparoscopic lumbar fusion to decrease cost or time of hospitalization or to increase the speed or incidence of return to activities are not currently available. Laparoscopic fusion of the lumbar spine appears to be a potentially attractive approach to treating axial back pain secondary to different causes. Although the technique is(More)
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