Related Experiment Video
Updated: Apr 15, 2026
07:32
Author Spotlight: 3D Movement Assessment of Maxillary Posterior Teeth in Clear Aligner Treatment
Published on: February 23, 2024
2.1K
A reliable method for evaluating upper molar distalization: Superimposition of three-dimensional digital models.
Ruhi Nalcaci1, Ayse Burcu Kocoglu-Altan2, Ali Altug Bicakci3
1Department of Orthodontics, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkey.
Korean Journal of Orthodontics
|March 24, 2015
Summary
Three-dimensional (3D) digital models reliably assess upper molar distalization, offering a valid alternative to traditional cephalometric radiographs and plaster model photocopies for evaluating orthodontic treatment outcomes.
Area of Science:
- Orthodontics
- Dental Imaging
- Biomedical Engineering
Background:
- Accurate assessment of maxillary first molar distalization is crucial in Class II malocclusion treatment.
- Conventional methods like cephalometric radiography and plaster model analysis have limitations in precision and reproducibility.
- Three-dimensional (3D) digital modeling offers a potential advancement in orthodontic measurement techniques.
Purpose of the Study:
- To evaluate the reliability of 3D digital models for measuring upper molar distalization.
- To compare measurements from 3D models with those from lateral cephalometric radiographs and plaster model photocopies.
- To assess the accuracy of 3D models in evaluating molar rotation and expansion of adjacent teeth.
Main Methods:
- Collected data from plaster models and lateral cephalometric radiographs of 20 Class II patients.
- Evaluated maxillary first molar distalization using lateral cephalometric radiographs (group CP), plaster model photocopies (group PH), and 3D digital models (group TD).
- Measured molar rotation and tooth expansion in groups PH and TD for comparative analysis.
Main Results:
- No significant differences were found in the amount of molar distalization among the three measurement groups (CP, PH, TD).
- Comparisons between plaster model photocopies (PH) and 3D digital models (TD) showed no significant differences in measured parameters.
- 3D digital models demonstrated comparable reliability to conventional methods for assessing molar distalization.
Conclusions:
- Three-dimensional (3D) digital models are a reliable tool for assessing the outcomes of upper molar distalization.
- 3D digital models represent a valid and potentially more efficient alternative to conventional measurement techniques in orthodontics.
- The findings support the integration of 3D digital modeling in routine orthodontic practice for treatment evaluation.
