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Updated: Aug 19, 2025
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A Spine Robotic-Assisted Navigation System for Pedicle Screw Placement
Published on: May 11, 2020
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A Retrospective Analysis of Pedicle Screw Placement Accuracy Using the ExcelsiusGPS Robotic Guidance System: Case
Charles W Kanaly1,2, Danielle M Backes2, Nader Toossi3
1Steward St. Anne's Hospital, Fall River, Massachusetts, USA.
Operative Neurosurgery (Hagerstown, Md.)
|December 1, 2022
Summary
Robotic guidance in spine surgery demonstrated high accuracy for pedicle screw placement. This study found robot-assisted techniques to be safe and effective immediately after adoption, with no complications or revisions needed.
Area of Science:
- Neurosurgery
- Orthopedic Surgery
- Medical Robotics
Background:
- Robotic guidance is increasingly used in spine surgery.
- System-specific data are needed to confirm improved pedicle screw accuracy.
Purpose of the Study:
- To evaluate the accuracy of robot-assisted pedicle screw placement.
- To assess screw accuracy immediately after adopting robotic surgical techniques.
Main Methods:
- Retrospective study of 72 patients (326 screws) undergoing robot-assisted spinal surgery.
- Accuracy assessed using the Gertzbein-Robbins Scale and CT scans for screw placement offsets.
- Grading based on pedicle wall breach (Grade A: 0 mm).
Main Results:
- Overall accuracy rate of 97.5% for pedicle screws.
- Grade A accuracy (0 mm breach) was 82%.
- Average offsets: tip 1.9 mm, tail 2.0 mm, angular 2.6°.
Conclusions:
- Robot-assisted surgery enables accurate pedicle screw implantation upon initial use.
- The robotic technique was safe, with no complications or hardware revisions.
- Robotic guidance is a viable option for accurate pedicle screw placement in spinal stabilization.
