中国组织工程研究 ›› 0, Vol. ›› Issue (): 340-344.doi: 10.3969/j.issn.2095-4344.2017.03.003

• 脊柱植入物 spinal implant • 上一篇    下一篇

快速成型个体化导航模板辅助颈椎椎弓根螺钉的置入

张振辉,王庆德,梅 伟,毛克政,朱耀辉,郭润栋,姜文涛,刘沛霖,王仲伟   

  1. 郑州市骨科医院脊柱一科,河南省郑州市 450052
  • 修回日期:2016-11-09 出版日期:2017-01-28 发布日期:2017-01-28
  • 通讯作者: 王庆德,博士,郑州市骨科医院脊柱一科,河南省郑州市 450052
  • 作者简介:张振辉,男,1988年生,河南省濮阳市人,汉族,2016年天津医科大学毕业,硕士,主要从事脊柱外科方面的研究。
  • 基金资助:

    郑州市普通科技攻关项目(141PPTGG327)

Transpedicular screw placement in the cervical vertebrae assisted by rapid prototyping individual navigation template

Zhang Zhen-hui, Wang Qing-de, Mei Wei, Mao Ke-zheng, Zhu Yao-hui, Guo Run-dong, Jiang Wen-tao, Liu Pei-lin, Wang Zhong-wei   

  1. First Department of Orthopedics, Orthopedic Hospital of Zhengzhou City, Zhengzhou 450052, Henan Province, China
  • Revised:2016-11-09 Online:2017-01-28 Published:2017-01-28
  • Contact: Wang Qing-de, M.D., First Department of Orthopedics, Orthopedic Hospital of Zhengzhou City, Zhengzhou 450052, Henan Province, China
  • About author:Zhang Zhen-hui, Master, First Department of Orthopedics, Orthopedic Hospital of Zhengzhou City, Zhengzhou 450052, Henan Province, China
  • Supported by:

    the General Science and Technology Project of Zhengzhou City, No. 141PPTGG327

摘要:

文章快速阅读:

 

 

文题释义:
快速成型个体化导航模板:基于逆向工程原理和快速成型技术两者结合设计及制作出的一种导航模板,主要用于术中辅助颈椎椎弓根螺钉的置入。遵循个体化原则,可以实现根据患者术前特点,设计与之匹配的模板,简化手术操作,降低手术风险。
颈椎椎弓根螺钉:相比其他内固定方式,颈椎椎弓根螺钉内固定有着抗拔出力强,螺钉稳定性好等优点,在治疗颈椎骨折、肿瘤、畸形、后纵韧带骨化等方面,可以提供优良的生物力学稳定性,但其损伤神经及血管的风险较高,置钉困难,限制了该项技术的广泛推广及应用。
 
摘要
背景:颈椎椎弓根螺钉内固定系统治疗颈椎疾病可获得坚强的三柱稳定,但目前关于颈椎椎弓根置钉方法选择尚未达成一致,力求寻找一种更加简单、安全、准确的置钉方法。
目的:综合利用逆向工程原理和快速成型技术设计出一种新型个体化颈椎椎弓根置钉导航模板,观察并评估其辅助颈椎椎弓根螺钉置入的安全性和准确性。
方法:对8具成人尸体标本颈椎(C3-6)进行CT扫描获取DICOM数据,MIMICS软件重建颈椎三维模型,寻找颈椎椎弓根的最佳进钉通道。根据颈椎椎板的表面解剖学形态,设计与颈椎椎板相吻合的反向模板。最后将设计的椎弓根螺钉进钉通道和反向模板合成在一起,建立个体化导向模板的数据模型并以STL格式保存。利用快速成型技术打印出导航模板实物。将导航模板与椎体的后部结构贴合,辅助置入颈椎椎弓根螺钉,根据术后X射线片及CT扫描评价椎弓根螺钉位置的准确性。
结果与结论:①利用导航模板辅助置入颈椎椎弓根螺钉共64枚,62枚螺钉完全在椎弓根内,其中1枚螺钉穿破椎弓根内侧壁,1枚螺钉穿破椎弓根外侧壁,置钉准确性为97%左右;②快速成型个体化导航模板辅助颈椎椎弓根螺钉置入准确率高,增加了颈椎手术的安全性,具有较大的临床应用前景。

中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程
ORCID:
0000-0003-1537-0541(王庆德)

关键词: 骨科植入物, 脊柱植入物, 颈椎, 椎弓根螺钉, 逆向工程, 快速成型, 个体化导航模板

Abstract:

BACKGROUND: The cervical pedicle screws provide ideal three-column stability for cervical vertebra, but there is still no a standard with the choice of pedicle screw place methods in cervical vertebra. Here, we try to seek a simpler, safer and accurate pedicle screw place method.

OBJECTIVE: To evaluate the accuracy and security of transpedicular screw placement assisted by rapid prototyping individual navigation template.
METHODS: Eight cadaver cervical specimens (C3-6) were selected to take CT-scan and data were saved in DICOM format. Three-dimensional (3D) software MIMICS was used to establish the C3~6 3D model, and designed the best pedicle screw channel. According to the morphological feature of the posterior cervical spine elements, the reverse template was designed. Then, the best pedicle screw channels were fused into bilateral navigation template. The navigation template was manufactured by rapid prototyping, and saved in STL format. Rapid prototyping technology was used to print out the navigation template. Cervical pedicle screws were inserted with the assistance of navigation templates fitted with the posterior structure of the vertebral body. Postoperative X-ray and CT scan were used to evaluate the accuracy of screw placement.
RESULTS AND CONCLUSION: (1) Totally 64 screws were inserted with the assistance of individual navigation templates. Of them, 62 screws were completely in the pedicle; 1 screw perforated the medial cortex of pedicle; 1 screw perforated the lateral cortex of pedicle. Accuracy of screw placement was 97%. (2) The individual navigation template with a high accuracy rate is a feasible and safe method for cervical pedicle screw placement, which has great prospects for clinical application. 

中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程

Key words: Cervical Vertebrae, Internal Fixators, Tissue Engineering

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