Comparison of two 3-dimensional user-friendly voxel-based maxillary and 2-dimensional superimposition methods

Area of Science:

• Orthodontics
• Radiology
• Biomedical Imaging

Background:

• Traditional 2D cephalograms in orthodontics can be distorted and provide incomplete data.
• Cone-beam computed tomography (CBCT) offers 3D, undistorted imaging for comprehensive patient analysis.
• CBCT influences orthodontic treatment outcome assessment.

Purpose of the Study:

• To investigate the validity of 3D maxillary voxel-based superimpositions.
• To compare 3D superimposition methods with the 2D method recommended by the American Board of Orthodontists.

Main Methods:

• Retrospective study using pretreatment and posttreatment CBCT scans from 30 adolescent patients.
• 3D voxel-based superimpositions performed using Dolphin Imaging software.
• Comparison of two 3D anatomic registration areas against the 2D method, evaluating linear and angular changes of maxillary incisors and molars.

Main Results:

• Statistically significant U1 vertical differences were found but were clinically nonsignificant (0.52 mm, 0.76 mm).
• No statistically significant differences were observed for U1 angular and U6 vertical measurements between methods.
• 3D voxel-based superimpositions demonstrated high validity and reproducibility.

Conclusions:

• 3D voxel-based maxillary superimpositions yield results comparable to conventional 2D methods.
• The study supports the use of 3D CBCT imaging for more accurate orthodontic assessments.
• 3D superimposition is a valid and reliable tool for evaluating orthodontic treatment outcomes.