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Updated: Oct 10, 2025
Author Spotlight: Three-Dimensional Cephalometric Landmark Annotation Demonstration on Human Cone Beam Computed Tomography Scans
Published on: September 8, 2023
[Consistency of the landmark identification on two types of cephalograms from cone-beam CT]
Xiao-Qing Ma1, Ning Zhao, Xian Dong
1Department of Orthodontics, Shanghai Xuhui District Dental Center. Shanghai 200032, China.
Purpose:
To study the landmark consistency on two types of cephalograms reconstructed from the data of cone-beam CT(CBCT).
Methods:
CBCT data of 56 patients without teeth missing were uploaded into Dolphin software and transferred to the cephalograms. In the control group, the right half projection was taken while in the experimental group, the images achieved after 6 individual projections were managed to achieve the synthesized cephalograms. One experienced orthodontists traced the 23 frequently-used landmarks and the consistency was compared by means of Hotelling T2 test with SPSS 13.0 software package.
Results:
The tracing of anterior nasal ridge, posterior nasal ridge, upper incisor root tip, lower incisor edge, lower incisor root tip and condyle showed significant difference(P<0.05).
Conclusions:
The synthesized cephalograms in the experimental group show the anatomical structure more precisely which is more beneficial to landmark identification.
