[Positioning study of cervical vertebra pedicle axial line projective point by CT image reconstruction].
OBJECTIVE
To improve the safety and accuracy of trans-pedicle internal fixation for cervical vertebra by the parameter data measuring by CT reconstruction.


METHODS
Thirty volunteers were enrolled and be subjected to high-speed spiral CT for getting the data of C3-C7. The data included pedicle point-midline distance, pedicle sponge width, pedicle angle. The cervical vertebra pedicle morphology were reconstructed.


RESULTS
Reconstructed CT image data displayed that pedicle sponge width become larger and larger from C3 to C7; the pedicle depth didn't change significantly even from C3 to C7; pedicle angle become small from C3 to C7 and the range is from 33.76 degrees to 47.20 degrees; pedicle point-midline distance were almost similar even from C3 to C7. There were not statistical differences between the right side and the left side, but there were statistical differences between man and woman.


CONCLUSIONS
Reconstructed CT image can provide useful data for clinical cervical vertebra trans-pedicle internal fixation.
Xue
Feng
F
Department of Trauma and Orthopaedics, People's Hospital, Peking University, Beijing 100044, China.
Zhang
Pei-xun
PX
Zhang
Dian-ying
DY
Fu
Zhong-guo
ZG
Jiang
Bao-guo
BG
D000328:Adult; D001863:Bone Screws; D002574:Cervical Vertebrae / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D005260:Female; D005593:Fracture Fixation, Internal / Q000295:instrumentation / Q000379:methods; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008297:Male; D008875:Middle Aged; D036542:Tomography, Spiral Computed / Q000379:methods*