在置入下颈椎椎弓根螺钉时，C3椎动脉损伤的风险最大，其次为C 6,C7最小。
The highest risk of vertebral artery injury due to cervical pedicle screw implantation is at C3, secondarily at C6, and the lowest is at C7.
目的对X线透视下和计算机导航系统引导下颈椎椎弓根螺钉内固定的精确性进行对比研究。
Objective To evaluate the feasibility and accuracy of cervical spine pedicle screw fixation assisted by X-ray fluoroscopy and CT-based navigation system.
为确定颈椎手术中椎弓根螺钉放置位置，本研究对具体病人的快速原型工艺技术下建立的打孔模板进行了研究和评估。
In this study, the authors explored and evaluated the use of patient-specific, rapid prototype drill templates for PS placement in the cervical spine.
目的探讨计算机CT三维导航系统辅助下进行颈椎椎弓根螺钉内固定的可行性和置钉精确性。
Objective To evaluate the feasibility and accuracy of cervical pedicle screw fixation when assisted by CT-based navigation system.
实验目的：本文目的基于进行下颈椎椎弓根的相关经线及角度测量，定位更准确的椎弓根进钉点、置钉方向，为成功应用经颈椎椎弓根螺钉技术提供必要信息。
Objective: to go to more exact point and direction during the screw fixation make sure to insert screw successfully by measuring the dimension of the lower cervical spine pedicle.
方法总结CT三维导航系统辅助下置入的159枚颈椎（C2-7）椎弓根螺钉，术后进行经椎弓根螺钉水平的CT平扫，观察椎弓根螺钉置入的精确性。
Methods 159 pedicle screws inserted by CT-based navigation system and 145 cervical (C2-C7) pedicle screws inserted by X-ray fluoroscopy were observed by postoperative CT scan.
方法总结CT三维导航系统辅助下置入的159枚颈椎（C2-7）椎弓根螺钉，术后进行经椎弓根螺钉水平的CT平扫，观察椎弓根螺钉置入的精确性。
Methods 159 pedicle screws inserted by CT-based navigation system and 145 cervical (C2-C7) pedicle screws inserted by X-ray fluoroscopy were observed by postoperative CT scan.
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