Virtual design of trajectory of cervical crossing laminar screw

doi:10.3969/j.issn.2095-4344.0348

Abstract

Abstract:

BACKGROUND: Entry point and trajectory of C₂ crossing laminar screw can affect its clinical effect and safety.

OBJECTIVE: To explore the structural basis of application of C₂crossing laminar screw in China and the suitable entry point and trajectory using Mimics software through three-dimensional reconstruction, virtual design and measurement.

METHODS: Totally 400 cases of cervical CT data were collected between February 2012 and July 2016 at the Affiliated Hospital of Qingdao University. Three-dimensional reconstruction and virtual entry point and trajectory of C₂crossing laminar screw (3.5 mm in diameter) were performed using Mimics 15.0. C₂ morphology and screw trajectory were measured.

RESULTS AND CONCLUSION: (1) There were significant differences in the height and thickness of the C₂ laminae and spinous process between sexes (P < 0.05), which could support the application of C₂ crossing laminar screw. (2) Zone 5.0–6.0 mm posterior to the spinal canal was recommended as a feasible entry point due to the maximum success rate (92.1% in men, 86.1% in women) and maximum safe angle range. (3) These results suggest that domestic adults have appropriate anatomical basis for C₂ crossing laminar screw, and zone 5.0–6.0 mm posterior to the spinal canal was recommended as a feasible entry point.

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: Bone Nails, Image Processing, Computer-Assisted, Computer Simulation, Tissue Engineering

CLC Number:

R318

Sun Yue-rong, Wang Tian-rui, Pan Rong-fang, Wang Yan, Ren Chong-min, Zhang Guo-qing, Chen Bo-hua, Yue Bin. Virtual design of trajectory of cervical crossing laminar screw[J]. Chinese Journal of Tissue Engineering Research, 2018, 22(27): 4332-4336.

Figures/Tables 1

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