Related Experiment Video
Updated: Feb 27, 2026
07:32
Author Spotlight: 3D Movement Assessment of Maxillary Posterior Teeth in Clear Aligner Treatment
Published on: February 23, 2024
2.0K
A three-dimensional soft tissue analysis of Class III malocclusion: a case-controlled cross-sectional study
Ama Johal1, Amrit Chaggar1, Li Fong Zou1
1a Institute of Dentistry, Bart's and The London School of Medicine and Dentistry , Queen Mary University of London , UK.
Journal of Orthodontics
|July 6, 2017
Summary
Developing Class III incisor relationship patients aged 8-18 show distinct facial differences compared to Class I. These differences are most pronounced in antero-posterior and vertical facial dimensions, particularly in the lower face.
Area of Science:
- Orthodontics
- Craniofacial analysis
- 3D imaging
Background:
- Class III incisor relationship is a common malocclusion.
- Facial growth and development in Class III patients require detailed understanding.
- 3D optical surface scanning offers precise facial feature assessment.
Purpose of the Study:
- To compare facial features between Class I and Class III incisor relationship patients.
- To identify age- and gender-specific differences in facial morphology.
- To utilize 3D optical surface scanning for detailed craniofacial analysis.
Main Methods:
- Case-control study design.
- 3D optical surface scanning of facial soft tissues.
- Age and gender matching of Class III patients with Class I controls (ages 8-18).
Main Results:
- Class III subjects exhibited greater antero-posterior and vertical facial dimensions (P=.01 and P=.006, respectively).
- Significant differences were noted between ages 8-10 and 17-18 in both genders.
- The lower facial region showed the most substantial differences, followed by the mid-face.
Conclusions:
- Developing Class III incisor relationships are associated with significant, detectable differences in surface facial features.
- Facial morphology varies notably between Class I and Class III incisor relationships during growth.
- 3D optical scanning is effective in quantifying craniofacial differences in orthodontic patients.
