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Related Experiment Video

Updated: May 3, 2026

A Spine Robotic-Assisted Navigation System for Pedicle Screw Placement
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A robot-assisted surgical system using a force-image control method for pedicle screw insertion.

Wei Tian1, Xiaoguang Han2, Bo Liu1

  • 1Department of Spine Surgery, Beijing Jishuitan Hospital, Beijing, China.

Plos One
|January 28, 2014
PubMed
Summary
This summary is machine-generated.

This study introduces a robot-assisted surgical system for spinal fixation that uses force and image data to prevent cortical penetration. The system demonstrated high accuracy and safety in sheep vertebra pedicle screw placement.

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Area of Science:

  • Robotics in Surgery
  • Spinal Surgery
  • Surgical Navigation

Background:

  • Spinal posterior fixation requires precise pedicle screw placement.
  • Cortical penetration during screw insertion poses a significant risk.
  • Existing systems may lack real-time intraoperative safety features.

Purpose of the Study:

  • To introduce a novel robot-assisted surgical system for spinal posterior fixation.
  • To develop a system capable of automatically recognizing drilling states.
  • To evaluate the accuracy and safety of this system in sheep vertebrae.

Main Methods:

  • A Robotic Spinal Surgery System (RSSS) integrating optical tracking, navigation, and a force-sensing robot was developed.
  • The system utilized image and force feedback to detect drilling states and prevent cortical penetration.
  • Accuracy and safety were assessed through 32 pedicle screw insertions in sheep, including tests with deliberately incorrect trajectories.

Main Results:

  • All 32 pedicle screws were successfully placed within the pedicle without wall breaches.
  • Average deviations for entry points were minimal (0.50-0.65 mm) and angular deviations were low (1.48-1.9°).
  • The robot accurately identified drilling states and successfully prevented cortical penetration, even with incorrect trajectory planning.

Conclusions:

  • The Robotic Spinal Surgery System (RSSS) demonstrated high accuracy and safety for pedicle screw placement.
  • The system's ability to prevent cortical penetration is a significant safety enhancement.
  • These findings support the potential clinical application of the RSSS in spinal surgery.