Anatomic considerations for C2 pedicle screw placement: The use of computerized tomography measurements

Adebukoa Onibokun, Simona Bistazzoni, Marco Sassi, Larry T. Khoo

Research output: Contribution to journalArticle

Abstract

Objective: more detailed anatomical knowledge of the C2 pedicle is required to optimize and minimize the risk of screw placement. The aim of this study was to evaluate the linear and angular dimensions of the true C2 pedicle using axial CT. Methods: ninety three patients (47 males, 46 females mean age 48 years) who had cervical spinal CT imaging performed were evaluated for this study. Axial images of the C2 pedicle were selected and the following pedicle parameters were determined: pedicle width (PW, the mediolateral diameter of the pedicle isthmus, perpendicular to the pedicle axis) and pedicle transverse angle (PTA, that is, the angle between the pedicle axis and the midline of the vertebral body). Results: the overall mean pedicle width was 5.8+/-1.2mm. The mean pedicle width in males (6.0+/- 1.3mm) was greater than that in the female subjects (5.6 +/-1.1mm). This difference was not found to be statistically significant (p=.6790). The overall mean pedicle transverse angle was 43.9+A3.9 degrees. The mean PTA in males was 43.2+A3.8 degrees, while that in females was 44.7+A3.7 degrees. Conclusion: preoperative planning is absolutely mandatory, particularly in determining not only screw trajectory, but in analyzing individual patient anatomy and reception to a C2 pedicle screw.

Original languageEnglish
Pages (from-to)80-83
Number of pages4
JournalColuna/ Columna
Volume8
Issue number1
Publication statusPublished - Jan 2009

Keywords

  • Bone screws
  • Cervical vertebrae/anatomy
  • Histology
  • Tomography, X-ray computed

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Clinical Neurology
  • Surgery

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  • Cite this

    Onibokun, A., Bistazzoni, S., Sassi, M., & Khoo, L. T. (2009). Anatomic considerations for C2 pedicle screw placement: The use of computerized tomography measurements. Coluna/ Columna, 8(1), 80-83.