标题：微型快速成型导向模板辅助枢椎椎弓根螺钉置钉偏差分析

      作者：严超，陈剑锋，尚峥辉，梁杰，覃涛    (三峡大学人民医院宜昌市第一人民医院骨科，湖北 宜昌 443000)

      卷次： 2017年28卷2期

      【摘要】 目的 验证微型快速成型导板辅助后路枢椎椎弓根螺钉置钉的准确性及其偏差分析。方法 随机选取2012年9月至 2015年 9月三峡大学人民医院 12例受试者的枢椎CT连续扫描数据，利用Mimics10.01重建后，导入UG7.0，设计偏差检测板及枢椎后表面互补基板。在桌面 3D打印机器制作颈椎及导板模型，利用导板、直径 3 mm克氏针在3D颈椎模型模拟置钉。最后利用游标卡尺在偏差检测导板上测量出钉点距X轴、Y轴位移，克氏针置入长度，并同计算机测量数值比较。结果 游标卡尺测量组同计算机测量组比较，在进钉深度、X轴位移、Y轴位移方面差异均无统计学意义(P>0.05)，导板置钉准确性可靠。结论 使用微型导板在减少设计、制造时间同时能有效的辅助枢椎椎弓根螺钉置入，提高了该手术的安全性,同时为数字化导航手术的实现奠定了基础。
      【关键词】 微型导板；枢椎；椎弓根螺钉；偏差
      【中图分类号】 R686.1 【文献标识码】 A 【文章编号】 1003—6350（2017）02—0227—03

Deviation analysis of pedicle screw placement in axis assisted by micro rapid prototyping drill guide template.YAN Chao, CHEN Jian-feng, SHANG Zheng-hui, LIANG Jie, QIN Tao.
Department of Orthopedics, Three Gorges UniversityPeople's Hospital/the First People's Hospital of Yichang, Yichang 443000, Hubei, CHINA
【Abstract】 Objective To verify the accuracy and deviation of pedicle screw placement in axis assisted by mi-cro rapid prototyping drill guide template. Methods This study was based upon CT scans in axis of 12 subjects fromThree Gorges University People's Hospital between Sep. 2012 and Sep. 2015, using the Mimics10.01 for reconstructionand then UG7.0 for design of deviation detection plate and the axial inverse plate. Cervical model and guide plate weremade by desktop 3D printing machine, and guide plate and the Kirschner wire of 3 mm in diameter were used to simu-late the cervical screw drilling. The vernier caliper was applied to measure the length of Kirschner wire in the vertebra,displacement in the X axis and Y axis in deviation detection plate. The obtained data was compared with the computermeasurement. Results No statistically difference existed in the length of Kirschner wire in the vertebra, displacementin the X axis and Y axis between the vernier caliper measurement group and the computer measurement group (P>0.05).Conclusion Micro rapid prototyping drill guide template could reduce the designing and manufacturing time and at thesame time improve the surgery safety of posterior pedicle screw placement in axis.
      【Key words】 Micro rapid prototyping drill guide template; Axis; Pedicle screw; Deviation·论 著·doi:10.3969/j.issn.1003-6350.2017.02.018