摘要
目的 :测量国人下颈椎后结构的相关径线及角度 ,为颈椎后路内固定手术的设计及施行提供参考数据。方法 :对 35套正常成人颈椎干燥骨标本以及 10 0套 X线片和 CT片进行测量 ,包括椎弓根宽度、高度、长度、投影点位置、与椎体的夹角、侧块宽度、高度、厚度、后壁中心点与横突孔的距离和夹角、上关节突的倾角等。 结果 :标本测量与影像学测量间存在显著差异。影像学测量的颈椎椎弓根平均宽度 5 .13～ 6 .13m m,与椎体矢状面夹角 34 .43°～ 47.48°,与椎体横截面夹角 - 4.2 5°～10 .90°,侧块厚度 11.0 0～ 12 .78mm ,侧块后壁中心点与横突孔距离 11.30～ 12 .5 9mm ,夹角 5 .40°～ 8.89°,上关节突倾角46 .73°～ 5 7.2 3°。结论 :影像学测量结果更真实。颈椎侧块螺钉宜选用 3.5 mm直径 ,外倾 2 5°、头倾 5 0°置入 ;颈椎椎弓根变异较大 ,应尽量减少使用椎弓根螺钉。
Objective: To measure linear and angular parameters of the posterior structure of the lower cervical spine. Methods: Thirty five sets of normal adult dry cervical vertebrae and 100 sets of X ray and CT films were measured, including pedicle width, height, length, projection, pedicle body angle, lateral mass width, height, thickness, the distance and angle between the central point on the back wall of the lateral mass and the foramina transverse foramen, the supra articular process body angle. Results: Great difference was found between sample and image measurements. The image measurement showed the mean pedicle width ranged from 5.13 6.13 mm. The mean pedicle body angle in the transverse plane ranged from 34.43° 47.78°, in the sagittal plane ranged from -4.25° 10.90°. The mean lateral mass thickness ranged from 11.00 12.78 mm. The mean distance between the central point on the back wall of the lateral mass and the foramina transverse foramen ranged from 11.30 12.59 mm, and the mean angle ranged from 5.40° 8.89°. The mean supra articular process body angle in the sagittal plane ranged from 46.73° 57.23°. Conclusion: The image measurement is more truthful. The diameter of the lateral mass screw should be 3.5 mm. It should be inserted 25° lateral and 50° cephalad. The pedicle widthes and angles vary largely and the use of the pedicle screw in the cervical spine should be limited.
出处
《第二军医大学学报》
CAS
CSCD
北大核心
2000年第2期127-130,F003,共5页
Academic Journal of Second Military Medical University
基金
上海市医学领先学科资助项目!95 - -0 0 8
关键词
下颈椎
后结构
解剖学
影像学测量
lower cervical spine
posterior structure
anatomy
image measurement
