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Mixed reality guided root canal therapy.

Fangjie Li1, Qingying Gao2, Nengyu Wang2

  • 1Department of Biomedical Engineering Johns Hopkins University Baltimore Maryland USA.

Healthcare Technology Letters
|April 19, 2024
PubMed
Summary
This summary is machine-generated.

A new mixed reality application using an optical see-through head-mounted display (OST-HMD) significantly improves accuracy in root canal therapy (RCT). This technology enhances tool positioning, reducing errors and improving patient outcomes in dental procedures.

Keywords:
augmented realitydentistrytracking

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Area of Science:

  • Dentistry
  • Medical Imaging
  • Mixed Reality

Background:

  • Root canal therapy (RCT) is a common dental procedure to treat infected or inflamed teeth.
  • Accurate alignment of CT scan data with patient anatomy is crucial but challenging for RCT.
  • Current methods face difficulties in precise tool positioning, risking negative outcomes.

Purpose of the Study:

  • To develop and evaluate a mixed reality (MR) application for enhanced accuracy in root canal therapy (RCT).
  • To address challenges in CT scan alignment and depth perception during dental procedures.
  • To improve tool positioning, canal exploration, and perforation prevention in RCT.

Main Methods:

  • Development of an MR application utilizing an optical see-through head-mounted display (OST-HMD).
  • Integration of visual cues, an augmented mirror, and dynamic multi-view CT slices.
  • Preliminary experimental assessment and a user study with 6 participants.

Main Results:

  • Significant improvement in positioning accuracy: from 1.4 mm to 0.4 mm with Optical Tracker (NDI), and 2.8 mm to 2.4 mm with HMD.
  • Achieved submillimeter accuracy with NDI.
  • User study reported average crown plane displacement of 1.27 ± 0.83 cm, depth error of 0.90 ± 0.72 cm, and angular deviation of 1.83 ± 0.83°.

Conclusions:

  • The MR application effectively integrates CT information with patient teeth for precise tool placement.
  • The system demonstrates potential to enhance accuracy and outcomes in root canal therapy.
  • Further analysis highlights the impact of HMD localization and head motion on registration accuracy.