术后行植入螺钉节段的X线平片及CT扫描以确定螺钉植入情况。
X-ray and CT scan were performed at operated levels post-operatively to evaluate the accuracy of the pedicle screw insertion.
不锈钢螺丝系列：内六角螺栓，紧钉螺钉，机螺钉，自攻钉，马车螺丝，膨胀螺丝，吊环螺丝，牙条，开口销，平垫，弹垫等。
Stainless steel screw, hex bolt series: tighten screw, machine screw, nail screw, self-tapping screw, expansion bolts, carriage, lifting eyebolt, a tooth, flat mat, play split cotters cushion etc.
主营产品：各种紧固件、标准件、螺栓、螺柱、螺丝、螺钉、木螺钉、自攻螺钉、车削螺丝、组合螺丝、螺母、连接件、平垫、挡圈等。
Main products: various kinds of fasteners, standard, bolts, screws, bolts, screws, wood screws, tapping screws, turning the screw, the combination of screws, nuts, fittings, flat mat, ring, etc.
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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