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Augmented reality for narrow area navigation in jaw surgery: Modified tracking by detection volume subtraction

Srijana Budhathoki1,2, Abeer Alsadoon1,2, P W C Prasad1,2

  • 1School of Computing and Mathematics, Charles Sturt University, Sydney Campus, Australia.

The International Journal of Medical Robotics + Computer Assisted Surgery : MRCAS
|February 25, 2020
PubMed
Summary

This study introduces a 2D/3D augmented reality (AR) system to enhance surgical instrument navigation accuracy in jaw surgery. The system reduces positional errors, improving precision in complex anatomical areas.

Keywords:
augmented realityjaw surgerynavigationsurgical instrumentstracking by detection

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Area of Science:

  • Medical technology
  • Surgical navigation
  • Augmented reality in medicine

Background:

  • Augmented reality (AR) navigation in jaw surgery faces challenges with narrow anatomical areas.
  • Surgeons must precisely avoid nerves, vessels, and teeth, not just root canals.
  • Inaccurate instrument positioning can lead to critical errors like cutting blood vessels or nerve channels.

Purpose of the Study:

  • To decrease positional error during jaw surgery.
  • To improve navigational accuracy in AR-assisted procedures.
  • To enhance the safety and precision of complex surgeries.

Main Methods:

  • A 2D/3D system was developed to track surgical instruments, distinguishing between the shaft and cutting element.
  • The system utilizes image descriptors of the instrument as input for 3D position estimation.
  • Output provides precise 3D coordinates of the surgical cutter.

Main Results:

  • Positional error was significantly reduced in jawbone-maxillary and mandibular surgeries.
  • Video alignment accuracy improved from 0.40–0.55 mm to 0.25–0.35 mm.
  • Processing speed increased to 11–14 frames per second, surpassing existing solutions (8–12 fps).

Conclusions:

  • The proposed AR system enhances navigation accuracy in deep anatomical corridors.
  • Focusing overlay on the operative area improves precision.
  • Increased accuracy in surgical instrument positioning contributes to safer and more effective jaw surgery.