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Three-dimensional spiral CT measurement of atlantal pedicle and its clinical application

  • Authors:
    • Wengui Xie
    • Pengfei Gao
    • Lixin Ji
  • View Affiliations / Copyright

    Affiliations: Department of Spinal Surgery, North Medical District of Linyi People's Hospital, Linyi, Shandong 276005, P.R. China
    Copyright: © Xie et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 1467-1474
    |
    Published online on: June 28, 2017
       https://doi.org/10.3892/etm.2017.4710
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Abstract

The study aimed to establish the safe placement area and corresponding entry angle of atlantal pedicle screw using axial computed tomography (CT) measurement of atlas, in order to guide the clinical operation. Spiral thin-slice CT scan of atlas and three-dimensional reconstruction of 38 patients were randomly selected. Screw placement space was defined as the distance between the tangent lines of entry channel on the atlantal cross section and inner edge of transverse foramen and outer edge of spinal canal. Before operation, spiral CT measurement was used to determine the safe placement area, and the pipeline dredge method was used to conduct the internal fixation of atlantal pedicle screw for 7 patients. In CT measurements, the width of pedicle was 9.15±2.57 mm, which could safely accommodate screws with the diameter of 3.5 mm. The safe placement area was located in posterior arch of atlas (18.35±2.86 to 25.26±1.76 mm) away from the posterior tubercle, the entry angle ranged from 9.09±7.45˚ outward to 18.72±17.42˚ inward, and the length of screw channel ranged from 26.20±2.69 to 27.04±2.51 mm. The width of the safe placement area was up to 6.91±7.66 mm, and the angle of inclination on cross section was up to 27.81±10.32˚. In conclusion, we identified a safe placement area for atlantal pedicle screw, where the screw was implanted inwards and outwards according to different entry points within the safe placement area. The detailed preoperative image measurement, determination of safe placement area and individual screw placement were found to be the key to a successful surgery.
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Copy and paste a formatted citation
Spandidos Publications style
Xie W, Gao P and Ji L: Three-dimensional spiral CT measurement of atlantal pedicle and its clinical application. Exp Ther Med 14: 1467-1474, 2017.
APA
Xie, W., Gao, P., & Ji, L. (2017). Three-dimensional spiral CT measurement of atlantal pedicle and its clinical application. Experimental and Therapeutic Medicine, 14, 1467-1474. https://doi.org/10.3892/etm.2017.4710
MLA
Xie, W., Gao, P., Ji, L."Three-dimensional spiral CT measurement of atlantal pedicle and its clinical application". Experimental and Therapeutic Medicine 14.2 (2017): 1467-1474.
Chicago
Xie, W., Gao, P., Ji, L."Three-dimensional spiral CT measurement of atlantal pedicle and its clinical application". Experimental and Therapeutic Medicine 14, no. 2 (2017): 1467-1474. https://doi.org/10.3892/etm.2017.4710
Copy and paste a formatted citation
x
Spandidos Publications style
Xie W, Gao P and Ji L: Three-dimensional spiral CT measurement of atlantal pedicle and its clinical application. Exp Ther Med 14: 1467-1474, 2017.
APA
Xie, W., Gao, P., & Ji, L. (2017). Three-dimensional spiral CT measurement of atlantal pedicle and its clinical application. Experimental and Therapeutic Medicine, 14, 1467-1474. https://doi.org/10.3892/etm.2017.4710
MLA
Xie, W., Gao, P., Ji, L."Three-dimensional spiral CT measurement of atlantal pedicle and its clinical application". Experimental and Therapeutic Medicine 14.2 (2017): 1467-1474.
Chicago
Xie, W., Gao, P., Ji, L."Three-dimensional spiral CT measurement of atlantal pedicle and its clinical application". Experimental and Therapeutic Medicine 14, no. 2 (2017): 1467-1474. https://doi.org/10.3892/etm.2017.4710
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