Objective To explore the feasibility of the novel C2 spinous lamina screw by using anatomical measurements on CT images and digital three-dimensional reconstruction. Methods Cervical CT data from 120 adults (59 males and 61 females) were collected and imported into Mimics 21.0 software using Dicom format for slicing and data measurement, 3D reconstruction and simulated screw placement. The thickness of C2 lamina, the height of C2 lamina, the length of C2 lamina, the width of the spinous root, the length of the simulated screw trajectory, the angle of inversion of the screw, the angle of inclination of the screw head, and the angle between the lamina and the sagittal plane were measured. The feasibility of the novel C2 spinous lamina screw placement was analyzed. Results There was no statistical difference between the measured data on both sides (P>0.05). There were significant differences in the height, thickness, and length of the C2 lamina, as well as the width of the spinous process and the length of the screw path between males and females (P<0.05). There were no significant differences in the uptilt angle of the screw, the medial tilt angle of the screw, and angle between lamina and sagittal plane of screws between male and female (P>0.05). The screw path length of the novel C2 spinous lamina screw was (27.16±3.92) mm for males and (23.90±4.25) mm for females, the medial tilt angle of the screw was (61.88±6.93) °, and the uptilt angle of the screw was (28.26±5.95) °. The length of the screw path of the novel C2 spinous lamina screw was moderately positively correlated with the height of the lamina and the thickness of the lower part of the lamina, and strongly positively correlated with the thickness of the upper and middle lamina. Conclusions The novel C2 spinous lamina screw is feasible in the study of imaging anatomy, and the results of CT measurement and computer simulation provide theoretical support for the subsequent biomechanical research and clinical application.
Key words
Atlantoaxial dislocation /
The novel C2 spinous lamina screw /
CT /
Anatomy
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