中国组织工程研究 ›› 2014, Vol. 18 ›› Issue (31): 5024-5029.doi: 10.3969/j.issn.2095-4344.2014.31.018

• 数字化骨科 digital orthopedics • 上一篇    下一篇

计算机3D模型在模拟寰椎椎弓根钉最佳进钉方向中的应用

覃  涛1,杜远立1,郑  东2,祝文涛2   

  1. 1三峡大学人民医院骨科,湖北省宜昌市  443000;2华中科技大学同济医学院附属协和医院骨科,湖北省武汉市  430023
  • 收稿日期:2014-06-10 出版日期:2014-07-23 发布日期:2014-07-23
  • 通讯作者: 祝文涛,华中科技大学同济医学院附属协和医院骨科,湖北省武汉市 430023
  • 作者简介:覃涛,男,1979年生,湖北省宜昌市人,汉族,2006年武汉大学医学院毕业,硕士,主治医师,主要从事脊柱外科、关节外科方面的研究。
  • 基金资助:

    湖北省科技厅自然科学基金资助项目(2013CDB09302)

Computer simulation of three-dimensional modeling for the best screw direction in atlas pedicle

Qin Tao, Du Yuan-li, Zheng Dong, Zhu Wen-tao   

  1. 1Department of Orthopedics, People’s Hospital, Three Gorges University, Yichang 443000, Hubei Province, China; 2Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430023, Hubei Province, China
  • Received:2014-06-10 Online:2014-07-23 Published:2014-07-23
  • Contact: Zhu Wen-tao, Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430023, Hubei Province, China
  • About author:Qin Tao, Master, Attending physician, Department of Orthopedics, People’s Hospital, Three Gorges University, Yichang 443000, Hubei Province, China
  • Supported by:

    the Natural Science Foundation of Science and Technology Department of Hubei Province, No. 2013CDB09302

摘要:

背景:寰枢椎解剖结构特殊,同胸腰椎相比,置钉点缺乏固定的解剖标志,而且椎弓根结构变异较大,目前一致的观点是建议个体化的置钉方案。骨科数字软件技术的发展为术前设计提供了新的技术手段。
目的:原创设计出3D矩阵模型,观察寰椎椎弓根通道、置钉安全区,测量最佳置钉方案,简化寰椎椎弓根螺钉进钉方案的术前设计。
方法:将三峡大学人民医院影像归档和通信系统中12例健康成人的寰椎CT连续断层扫描数据导入Mimics 10.01软件,其中男7例,女5例;年龄30-65岁,平均45岁,三维重建后利用.dwg文件导入3dmax2009。确定三维参照坐标和进钉点,用3dmax中参考建模命令建立17×17×2,间距2.5°,水平面角0°-40°,矢状面角0°-40°,共578个元素模拟椎弓根螺钉阵列模型,通过透视图观察直径为3.5 mm,长度为22 mm模拟螺钉在椎弓根通道中的情况,从而确定安全区,测量最佳置钉方案及螺钉角度。  
结果与结论:12例受试者矩阵研究元素总数目为17×17×2×12,共6 936个元素单位。其中175个元素符合进钉要求,左、右侧椎弓根内螺钉数目比较,差异无显著性意义(P > 0.05)。提示利用数字3D建模技术能有效、简单、精确的进行寰椎椎弓根置钉的术前设计。


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


全文链接:

关键词: 植入物, 数字化骨科, 寰椎, 三维建模, 椎弓根钉通道, 阵列模型

Abstract:

BACKGROUND: Atlantoaxial anatomical structures were special. Compared with thoracolumbar vertebrae, there is no fixed anatomical marker for screw implantation. Moreover, pedicle structural variation is great. The current consensus view is to suggest an individualized program of pedicle screws. The development of orthopedic digital software technology provides a novel manner for preoperative design.
OBJECTIVE: To originally design 3D matrix model, to observe atlas pedicle channel, pedicle screw safety zone, to measure optimal program for screw fixation, and to simplify preoperative design of entering pedicle screw.
METHODS: Continuous atlas CT data of 12 healthy adults in picture archiving and communication system of People’s Hospital, Three Gorges University were imported into Mimics 10.01 software. There were seven males and five females, at the age of 30-65 years old, averagely 45 years. After three-dimensional reconstruction, the three-dimensional reconstruction models were imported into 3Dmax 2009 as .dwg format. The reference three-dimensional planes and the sites of nail insertion were determined by the atlas modeling. The modeling consisted of 17×17×2 elements and the transverse section angles ranged from 0° to 40° and the sagittal section  angles ranged from 0° to 40° with a space of 2.5°. 578 elements were used to simulate pedicle screw array model. Perspective observation showed that the diameter was 3.5 mm, and length was 22 mm in pedicle channel. Thus, safety area, best screw channel and screw angle were analyzed. 
RESULTS AND CONCLUSION: The total number of elements in the matrix study was 17×17×2×12 in 12 subjects. 175 screws in total of 6 936 units could safely meet the operative standard. No significant difference in the number of pedicle screw between left and right sides (P > 0.05). Results indicated that the digital three-dimensional modeling technology is an effective, simple, accurate way in the preoperative design and measurement for atlas pedicle surgery.


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


全文链接:

Key words: internal fixators, imaging, three-dimensional, tomography

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