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Updated: Aug 8, 2026
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Pedicle Screw Placement Using an Augmented Reality Head-Mounted Display in a Porcine Model
Published on: May 24, 2024
Image-guided thoracic pedicle screw placement: a technical study in cadavers and preliminary clinical experience
K D Kim1, J P Johnson, J D Babbitz
1Department of Neurological Surgery, University of California, Davis, Sacramento, USA. kdkim@ucdavis.edu
Neurosurgical Focus
|June 6, 2006
Summary
Image-guided thoracic pedicle screw placement improves accuracy compared to historical data. Surgeons must understand the system
Area of Science:
- Spinal Surgery
- Medical Imaging
- Orthopedic Surgery
Background:
- Thoracic pedicle screw fixation is crucial for spinal stabilization.
- Accurate screw placement is challenging due to small thoracic pedicles and proximity to the spinal cord.
- Previous studies validated image-guidance for lumbar pedicle screws, but not thoracic.
Purpose of the Study:
- To evaluate the accuracy of image-guided thoracic pedicle screw placement.
- To compare the accuracy of this technique in vitro and in vivo.
Main Methods:
- Image-guided thoracic pedicle screws were placed in 5 human cadavers (120 screws) and 10 patients (45 screws).
- Accuracy was assessed using postoperative CT scans and visual inspection in cadavers.
- Postoperative imaging studies evaluated screw accuracy in patients.
Main Results:
- In cadavers, 19.2% (23/120) of screws had pedicle violations.
- In the last two cadavers, pedicle violation rates decreased to 4.2% each.
- In patients, 6.7% (3/45) of screws resulted in pedicle violations.
Conclusions:
- Image-guidance significantly improves thoracic pedicle screw placement accuracy compared to historical controls.
- The system enhances visualization of the thoracic pedicle and surrounding structures.
- Surgeons require anatomical knowledge and awareness of system limitations to prevent complications.
