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Author Spotlight: Three-Dimensional Cephalometric Landmark Annotation Demonstration on Human Cone Beam Computed Tomography Scans
Published on: September 8, 2023
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Computerized three-dimensional cephalometric template for Thai adults.
Jeenarat Duangsuwan1, Somchart Raocharernporn2, Sasipa Thiradilok1
1Department of Advanced General Dentistry, Faculty of Dentistry, Mahidol University, Thailand.
Heliyon
|April 25, 2023
Summary
This study developed 3D cephalometric templates for Thai adults using cone-beam computed tomography (CBCT) scans. These novel templates provide essential cephalometric norms for various health science disciplines, with separate versions for men and women.
Area of Science:
- Medical Imaging
- Anthropology
- Forensic Science
Background:
- Cephalometry is crucial in health sciences, anthropology, and forensics.
- Three-dimensional (3D) cephalometric templates offer an advanced method for these fields.
Purpose of the Study:
- To establish cephalometric norms for Thai adults by developing 3D templates.
- To utilize cephalometric landmark coordinates from cone-beam computed tomography (CBCT) scans.
Main Methods:
- Collected full-head CBCT scans from 45 Thai adults (20 men, 25 women) with Class I occlusion.
- Identified 21 cephalometric landmarks and transformed coordinates to universal Cartesian coordinates.
- Assessed inter- and intra-examiner reliability using Intraclass Correlation Coefficients (ICC) and Bland-Altman (BA) plots.
Main Results:
- High inter- and intra-examiner reliability (ICC=0.961-1.000, BA mean error=-0.1 mm).
- Most cephalometric measurements showed no statistical difference compared to a previous study.
- Significant differences were found in Z-axis coordinates between men and women.
Conclusions:
- Generated separate 3D cephalometric templates for adult Thai men and women.
- These free templates can aid various medical and dental specialties.
- Caution is advised for incisor angulation when using the templates.
