临床骨科杂志2016，Vol.19Issue(6)：641-643,647,4.DOI:10.3969/j.issn.1008-0287.2016.06.001
新型单椎单侧椎弓根导向模板辅助下颈椎椎弓根个体化置钉
Individualized unilateral navigation template assisting inferior cervical pedicle screw fixation
摘要
Abstract
Objective To explore the accuracy of new navigation template for inferior cervical pedicle screw place-ment. Methods Preoperative CT scan was applied in 22 patients requiring inferior cervical pedicle screw fixation. According to CT scan data, three-dimensional cervical vertebrae models were made and the individualized unilateral navigation templates of cervical vertebral pedicle were designed by using reverse engineering and rapid prototyping de-riving from Minics 16. 0 and Imageware 12. 0 software. Cervical pedicle screws were inserted with the assistance of navigation templates. The position of screws were evaluated by postoperative CT scan, according to Lee et al criteri-on:grade 0, no perforation;grade 1, perforation less than 25%;grade 2, perforation from 25% to 50%;grade 3, perforation more than 50%. Grade 0 and 1 were regarded as accuracy and grade 2 and 3 were regarded as misplace-ment. Results All 22 cases were followed up for 6~36 months. 113 pedicle screws were inserted in total, 3 lateral mass screws were used to replace preoperative planned pedicle screws in 22 patients, including 107 screws with grade 0, 4 screws with grade 1, 2 screws with grade 2. Two screws were misplaced. The accuracy rate was 98. 2%. The 6 pedicle screws belonging to grade 1 and 2 all perforated lateral wall. No pedicle screw perforated medial, superior or inferior wall. No complications resulted from screws misplacement occurred, such as the injury of vertebral artery, spinal cord or nerve root. Conclusions The individualized unilateral navigation template assisting inferior cervical pedicle screw fixation is a new method with high accuracy and low complications.关键词
椎弓根螺钉/椎弓根导向模板/误置/逆向工程/快速成型Key words
pedicle screw/unilateral navigation template/misplacement/reverse engineering/rapid prototyping分类
医药卫生引用本文复制引用
史航,朱裕成,马军,李涛,吴小涛,王杨..新型单椎单侧椎弓根导向模板辅助下颈椎椎弓根个体化置钉[J].临床骨科杂志,2016,19(6):641-643,647,4.基金项目
江苏省“333工程”培养基金资助项目(编号:BK2014718) （编号:BK2014718）
宿迁市科技支撑计划项目(编号:S201414) （编号:S201414）
