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Updated: Jun 25, 2025
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A Spine Robotic-Assisted Navigation System for Pedicle Screw Placement
Published on: May 11, 2020
8.8K
Mixed Reality-Based Navigation for Pedicle Screw Placement: A Preliminary Study Using a 3D-Printed Spine Model.
Masayuki Ohashi1, Masayuki Sato1, Hideki Tashi1
1Department of Orthopedic Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata, JPN.
Cureus
|May 30, 2024
Summary
Mixed reality (MR) significantly improved pedicle screw (PS) placement accuracy compared to the freehand technique. This novel approach enhances surgical safety and feasibility for spinal fusion procedures.
Area of Science:
- Spinal Surgery
- Medical Imaging
- Mixed Reality Technology
Background:
- Mixed reality (MR) technology enables manipulation of 3D virtual images (holograms).
- Accurate pedicle screw (PS) placement is critical in spinal fusion surgery.
Purpose of the Study:
- To evaluate the accuracy of MR-assisted pedicle screw (PS) placement using 3D spine models.
Main Methods:
- Created 3D-printed and holographic spine models from patient CT data.
- Superimposed holographic PS trajectories onto 3D models using MR headset.
- Compared MR-assisted placement with freehand technique on 3D models.
Main Results:
- MR-assisted technique showed a pedicle violation rate of 4.5% (1/22 screws).
- Freehand technique resulted in a 29.2% pedicle violation rate (7/24 screws).
- The difference in violation rates was statistically significant (P = 0.049).
Conclusions:
- MR-assisted system demonstrated significantly lower pedicle screw misplacement rates.
- MR technology is a promising tool for improving PS placement feasibility, safety, and accuracy.
- Further cadaveric and clinical studies are warranted to validate these findings.
