Related Experiment Video
Updated: Jul 13, 2026

A Postoperative Evaluation Guideline for Computer-Assisted Reconstruction of the Mandible
Published on: January 28, 2020
Effects of horizontal dimensional malocclusion on changes in smile measurements in frontal, oblique, and lateral
Johnson Hsin-Chung Cheng1,2, Ming-Han Feng2, Ching-Cheng Hsu2
1School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan.
Background/Purpose:
Horizontal skeletal discrepancies can influence smile esthetics, but their impact on smile dynamics from different photographic perspectives remains underexplored. This study aimed to evaluate how horizontal malocclusion affects soft tissue changes in frontal, oblique, and lateral smile views.
Materials And Methods:
This retrospective study analyzed pre-treatment facial photographs of 200 patients. Subjects were divided into subgroups based on ANB angle and overjet values. Smile characteristics were measured from frontal, oblique, and lateral views at rest and during smiling. Variables were expressed as ratios relative to subnasale-menton distance. Statistical comparisons were made using ANOVA, Scheffé post hoc tests, and multiple regression analysis.
Results:
Significant differences in smile measurements were more prominent in the oblique and lateral views than in the frontal view. Among ANB groups, greater discrepancies were noted in lower facial landmarks such as menton and pogonion. Oblique views were most sensitive in detecting differences in smile change, particularly among subjects with Class III malocclusion.
Conclusion:
Horizontal dimensional malocclusion significantly affects soft tissue smile dynamics, particularly in the oblique view. Multiview smile analysis enhances diagnostic accuracy and should be considered in orthodontic assessment and treatment planning.
More Related Videos
05:54Real-Time Dynamic Navigation System for the Precise Quad-Zygomatic Implant Placement in a Patient with a Severely Atrophic Maxilla
Published on: October 18, 2021
07:32Author Spotlight: 3D Movement Assessment of Maxillary Posterior Teeth in Clear Aligner Treatment
Published on: February 23, 2024
Related Concept Videos
Beams with Unsymmetric Loadings
The first moment-area theorem determines the slope at any point on the beam. This theorem indicates that the change in slope between two points on a beam...
Depth Perception and Spatial Vision
Influence of Earth's Curvature and Atmospheric Refraction on Leveling
Common Leveling Mistakes and Errors
Derivatives of Inverse Trigonometric Functions
Interpretations of Partial Derivatives