Related Experiment Video
Updated: Apr 7, 2026
06:18
Pedicle Screw Placement Using an Augmented Reality Head-Mounted Display in a Porcine Model
Published on: May 24, 2024
2.9K
Augmented Reality Navigation for Pedicle Screw Fixation: Technical Accuracy and Feasibility in a Human Cadaveric
Sang-Min Park1, Dongjoon Kim2, Dae-Woong Ham3
1Spine Center and Department of Orthopedic Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
Clinics in Orthopedic Surgery
|April 6, 2026
Summary
A new augmented reality navigation for pedicle screw fixation (ARNF) system shows high accuracy in cadaver studies. This technology offers precise guidance, improving pedicle screw placement and addressing limitations of traditional navigation methods.
Area of Science:
- Spinal Surgery
- Medical Technology
- Surgical Navigation
Background:
- Accurate pedicle screw placement is crucial for spinal stabilization but remains a surgical challenge.
- Conventional navigation systems can disrupt surgical workflow and surgeon focus.
- Limitations of current navigation methods necessitate innovative solutions.
Purpose of the Study:
- To evaluate the feasibility and accuracy of a novel augmented reality navigation for pedicle screw fixation (ARNF) system.
- To assess the ARNF system's performance in a human cadaveric model.
- To compare ARNF system accuracy against established benchmarks for pedicle screw placement.
Main Methods:
- Placement of 18 pedicle screws across thoracolumbar vertebrae (T12-L4) in two human cadavers.
- Utilized a head-mounted display projecting 3D spine models and screw trajectories.
- Registration via 15 anatomical landmarks; accuracy assessed by CT scans and Gertzbein-Robbins classification.
Main Results:
- 100% of pedicle screws achieved clinically acceptable placement (16 Grade A, 2 Grade B).
- Mean entry point deviation was 0.17 mm, tip deviation 0.80 mm, and angular deviation 2.14°.
- Average placement time was 3.1 minutes per screw.
Conclusions:
- The ARNF system demonstrated high accuracy and precision for pedicle screw fixation in a cadaveric model.
- This technology enables surgeons to maintain focus on the surgical field while receiving precise navigation.
- ARNF holds potential to overcome limitations of conventional navigation systems in spinal surgery.
