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Updated: Jun 12, 2026
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A Spine Robotic-Assisted Navigation System for Pedicle Screw Placement
Published on: May 11, 2020
[Experimental study on screw insertion in lower cervical pedicle assisted by multi-spiral computerized tomography
1Department of Orthopaedics, First Affiliated Hospital of Kunming Medical College, Kunming, Yunnan 650032, PR China.
Summary
Multi-spiral CT (MSCT) 3D reconstruction accurately guides lower cervical transpedicular screw insertion. This technique improves surgical safety and accuracy by enabling precise preoperative planning and intraoperative evaluation.
Area of Science:
- Neurosurgery
- Radiology
- Orthopedic Surgery
Background:
- Transpedicular screw insertion in the lower cervical spine is a critical procedure for spinal stabilization.
- Accurate screw placement is essential to avoid neurological injury and ensure surgical success.
- Traditional methods for screw placement may have limitations in precision for the complex cervical anatomy.
Purpose of the Study:
- To evaluate the clinical significance and accuracy of multi-spiral CT (MSCT) with 3D image reconstruction for transpedicular screw insertion in the lower cervical spine.
- To assess the feasibility of using MSCT multi-planar reformation (MPR) imaging for preoperative planning and postoperative accuracy evaluation.
Main Methods:
- Eight cervical spine specimens underwent MSCT scanning and 3D reconstruction (volume rendering and multi-planar reformation) to determine ideal screw paths and measure parameters.
- Screws were inserted into C3-C7 pedicles based on preoperative plans, followed by repeat MSCT scanning to assess accuracy.
- A clinical study involved 28 patients undergoing lower cervical spine screw insertion, with MSCT used for preoperative assessment and postoperative evaluation.
Main Results:
- In specimen analysis, the one-time screw insertion success rate was 95.95% and the total accuracy rate was 91.89%, with a low penetration rate (8.11%).
- Clinical data showed that MSCT 3D reconstruction identified unsuitable pedicles preoperatively, allowing for surgical plan adjustments.
- Postoperative MSCT evaluation in patients revealed an 88.16% successful screw placement rate, with 11.84% penetration.
Conclusions:
- MSCT 3D reconstruction techniques are accurate for preoperative planning of ideal screw canals in the lower cervical spine.
- Adhering to individualized quantitative data derived from MSCT significantly enhances surgical safety and accuracy.
- MSCT MPR imaging is a feasible and effective tool for evaluating the accuracy of pedicle screw insertion.
