颈椎弓根置钉植入的新型3D打印导板有效性研究

doi:10.13418/j.issn.1001-165x.2017.02.006

Abstract

Abstract:

Objectives　To establish a new individual-oriented template for cervical pedicle screw placement by 3D printing technology, in order to provide an accurate and safe method for cervical internal fixation operation.　Methods　6 cases of adult cervical specimens, and 64-slice spiral CT scanning data was adopted. The 3D digital models of cervical were reconstructed based on the anatomical characteristics of the cervical vertebral lamina. The reverse templates were designed, which reflected accurately morphological features of the posterior cervical spine elements. The navigation modules were obtained with the method of 3D printing, and the direction and depth of screw channel in the operation were ensured. Using 3D printing navigation templates, 24 cervical pedicle screws were inserted. Postoperative CT scan was used to measure the length of each pedicle screw channel and the width of pedicle in order to evaluate the relationship between cervical pedicle and screw position.　Results　The individual 3D printing navigation templates can exactly fuse with the cervical vertebral lamina. Postoperative CT data can confirm that 84 screws are placed entirely within the pedicle. The actual length of pedicle screw insertion was 100%, and the width of pedicle screw insertion was up to 94.05%.　Conclusion　The new 3D printing navigation template of cervical pedicle screw insertion is safe and convenient during the internal fixation operation, and the accuracy of cervical pedicle screw implantation can be improved.

Key words: Cervical vertebra, Pedicle screw channel, 3D printing, navigation template

References

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The feasibility study of cervical pedicle screwed with new individual-oriented template by 3D printing technology

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