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A pilot study on an infrared jaw-tracking method for mandibular motion based on modified bite-fork registration:
Bingran Du1, Xinyue Wang2, Hao Jiang3
1Department of Stomatology, The Eighth Affiliated Hospital of Southern Medical University (The First People's Hospital of Shunde, Foshan), Foshan, Guangdong, 528308, China.
Journal of Dentistry
|April 18, 2025
Summary
A new infrared jaw-tracking method allows for repeated motion analysis without extra radiation from cone-beam computed tomography (CBCT). This technique accurately tracks jaw movements, offering a cost-effective and safe alternative for clinical evaluations.
Area of Science:
- Biomedical Engineering
- Dental Imaging
- Motion Analysis
Background:
- Accurate tracking of mandibular motion is crucial for diagnosing and managing various dental and temporomandibular joint disorders.
- Current methods often require multiple imaging sessions, increasing radiation exposure and costs.
- There is a need for non-invasive, repeatable tracking solutions.
Purpose of the Study:
- To develop and validate a novel infrared jaw-tracking method for repeated mandibular motion analysis.
- To eliminate the need for secondary cone-beam computed tomography (CBCT) exposure and additional registration procedures.
- To assess the accuracy, feasibility, and clinical utility of the developed jaw-tracking system.
Main Methods:
- An infrared jaw-tracking system utilizing a modified bite-fork for registration was developed.
- Accuracy was assessed by comparing linear distance measurements with CBCT imaging, calculating root mean square (RMS) errors.
- Feasibility was evaluated through analysis of incisor motion in 15 participants tracked by 15 dentists, with participant and dentist ratings collected.
Main Results:
- No significant differences were found between jaw-tracking and CBCT linear distance measurements (P > 0.05).
- Overall RMS errors for the jaw-tracking method were within 0.35 mm.
- High reliability was demonstrated for opening curvilinear path length (intraclass correlation coefficient = 0.947, P < 0.001), with observed 'figure-eight' trajectories and high satisfaction ratings (mean score ≥4.0).
Conclusions:
- The developed infrared jaw-tracking method provides accurate and repeatable mandibular motion tracking.
- This method eliminates the need for secondary CBCT scans and additional registration, reducing radiation exposure and costs.
- The system presents a promising, low-radiation, cost-effective approach for short-term evaluation of jaw movements.
