Chinese Journal of Tissue Engineering Research ›› 2014, Vol. 18 ›› Issue (35): 5660-5665.doi: 10.3969/j.issn.2095-4344.2014.35.015

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Accuracy of screw placement in child’s thoracic pedicle assisted by digital navigation template

Zhang Shao-jie1, 2, Wang Xing1, 2, Shi Jun3, Chen Jie1, Ma Shi-feng1, Wang Jian1, Li Zhi-jun1, 2,Zhang Yuan-zhi2, Liu Hong-wei1   

  1. 1Teaching and Research Office of Human Anatomy, the School of Basic Medicine, Inner Mongolia Medical University, Hohhot 010059, Inner Mongolia Autonomous Region, China; 2Digital Medical Center, Inner Mongolia Medical University, Hohhot 010059, Inner Mongolia Autonomous Region, China; 3Teaching and Research Office of Physiology, the School of Basic Medicine, Inner Mongolia Medical University, Hohhot 010059, Inner Mongolia Autonomous Region, China
  • Revised:2014-08-01 Online:2014-08-27 Published:2014-08-27
  • Contact: Li Zhi-jun, Master, Professor, Doctoral supervisor, Teaching and Research Office of Human Anatomy, the School of Basic Medicine, Inner Mongolia Medical University, Hohhot 010059, Inner Mongolia Autonomous Region, China; Digital Medical Center, Inner Mongolia Medical University, Hohhot 010059, Inner Mongolia Autonomous Region, China
  • About author:Zhang Shao-jie, Master, Lecturer, Teaching and Research Office of Human Anatomy, the School of Basic Medicine, Inner Mongolia Medical University, Hohhot 010059, Inner Mongolia Autonomous Region, China; Digital Medical Center, Inner Mongolia Medical University, Hohhot 010059, Inner Mongolia Autonomous Region, China Wang Xing, Master, Teaching assistant, Teaching and Research Office of Human Anatomy, the School of Basic Medicine, Inner Mongolia Medical University, Hohhot 010059, Inner Mongolia Autonomous Region, China; Digital Medical Center, Inner Mongolia Medical University, Hohhot 010059, Inner Mongolia Autonomous Region, China Zhang Shao-jie and Wang Xing contributed equally to this paper.
  • Supported by:

    the National Natural Science Foundation of China, No. 30660072, 81260269; the Natural Science Foundation of Inner Mongolia Autonomous Region of China, No. 2009MS1112, 2012MS1149; the Youth Innovation Project of Inner Mongolia Medical University, No. YKD2013QNCX018

Abstract:

BACKGROUND: Many scholars at home and abroad have already attempted to apply the technique of the internal fixation pedicle screw placement to cure children’s spinal injuries in recent years, because the children’s thoracic pedicle is more small, anatomical structure variation is big and adjacent relationship is complicated, so the application of adult’s pedicle screw technology simply to children who was in a continuous growth and development can increase operation risk greatly. Above this, improving the accuracy of nailing and reducing error rate become keys for further development of cervical pedicle fixation.
OBJECTIVE: To provide an individualized and accurate positioning method for screw placement in thoracic  pedicle of children by computer aided design and rapid prototyping technology. 
METHODS: After computed tomography scan of four cases of child specimens, the original data were made for three-dimensional reconstruction by the software, then the specimens were randomly divided into two groups: one group used the traditional pedicle internal fixation method, and the other group, first created the individual navigation template using the principle of reverse engineering and rapid prototyping technology. The lumbar pedicle screws were put into the samples by the individual navigation template. The position of the pedicle screws was evaluated according to the computer tomography scan.
RESULTS AND CONCLUSION: The accurate rate of screw placement of the traditional pedicle internal fixation method was 58%; and the accurate rate of screw placement of the individual digital navigation template method was 81%. The success rate was better than the traditional surgery group. Furthermore, chi square test showed that there was a significant difference between two groups (P < 0.05). These findings suggested that there has a high accuracy of the screw placement in thoracic pedicle of children assisted by the individual navigation template, fully reflects the principle of individualization of screw placement, and provides a new feasible method for accurate screw placement in thoracic pedicle of children.


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, thoracic vertebrae, computer-aided design

CLC Number: