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Morphometric evaluation of lower cervical pedicle and its projection
1Department of Orthopedic Surgery, Medical College of Ohio, Toledo, USA.
Spine
|January 1, 1997
Summary
This study measured lower cervical pedicle dimensions (C3-C6) to improve transpedicular screw fixation safety. Findings provide crucial anatomical data for surgical planning in the cervical spine.
Area of Science:
- Spinal anatomy
- Orthopedic surgery
- Neurosurgery
Background:
- Limited quantitative data exists for lower cervical pedicle dimensions and projection.
- Accurate transpedicular screw fixation in the cervical spine requires detailed anatomical understanding.
Purpose of the Study:
- To measure lower cervical pedicle dimensions from C3 to C6.
- To determine the pedicle axis location on the posterior lateral mass.
- To provide data for safer transpedicular screw fixation.
Main Methods:
- Anatomical evaluation of 40 dry cervical spine specimens (C3-C6).
- Measurements included pedicle height, width, length, and angulation.
- Analysis of projection point distances to reference lines on the lateral mass.
Main Results:
- Significant sex-based differences noted in C6 pedicle height and C4 pedicle sagittal angle.
- Pedicle sagittal angle showed the greatest variation (4.3-9.8 degrees).
- Projection point distances to the vertical line increased caudally.
Conclusions:
- This anatomical data enhances the safety of lower cervical transpedicular screw fixation.
- Preoperative imaging combined with these measurements aids surgical planning.
- Understanding individual variations is key for successful outcomes.