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Tracking Accuracy of a Stereo Camera-Based Augmented Reality Navigation System for Orthognathic Surgery.

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A new stereo camera augmented reality (AR) navigation system shows tracking accuracy comparable to existing infrared optical tracking systems (OTS) for maxillofacial surgery. This AR system offers similar reliability at a lower cost.

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Area of Science:

  • Medical Imaging
  • Surgical Navigation
  • Augmented Reality

Background:

  • Accurate tracking is essential for augmented reality (AR) in diagnosing and surgically correcting maxillofacial deformities.
  • Le Fort I osteotomy involves repositioning the maxilla, requiring precise navigation.

Purpose of the Study:

  • To investigate the tracking accuracy of a stereo camera-based AR navigation system for maxillary repositioning.
  • To compare its accuracy against an established infrared (IR)-based optical tracking system (OTS).

Main Methods:

  • Five maxillary surgery plans were created using a 6-degrees-of-freedom articulator with a target maxillary movement of 5 mm.
  • The stereo camera AR navigation system's accuracy was evaluated and compared to a commercial IR-based OTS.

Main Results:

  • The IR-based OTS achieved a mean error of 0.0584 mm and 98.83% accuracy.
  • The stereo camera AR navigation system demonstrated a mean error of 0.0596 mm and 98.81% accuracy.

Conclusions:

  • The developed stereo camera AR navigation system is reliable and accurate for maxillofacial surgery.
  • It achieves accuracy comparable to high-cost imported systems but at a significantly lower cost.
  • Potential applications include patient communication and clinical training.