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Author Spotlight: Three-Dimensional Cephalometric Landmark Annotation Demonstration on Human Cone Beam Computed Tomography Scans
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Craniofacial growth and morphology among intersecting clinical categories
Ryan P Knigge1,2,3, Anna M Hardin2,4, Kevin M Middleton2
1Department of Integrative Biology and Physiology, University of Minnesota Medical School, Minneapolis, Minnesota, USA.
Anatomical Record (Hoboken, N.J. : 2007)
|January 25, 2022
Summary
Craniofacial growth patterns vary significantly, influencing skeletal malocclusion. Understanding these growth timings and changes is key for personalized orthodontic treatments targeting specific vertical and anteroposterior (A-P) skeletal variations.
Area of Science:
- Orthodontics and Craniofacial Biology
- Developmental Biology
- Biometric Analysis
Background:
- Differential craniofacial growth patterns are primary drivers of skeletal malocclusion.
- Individualized orthodontic strategies necessitate understanding growth milestones and morphological changes in adult malocclusions.
Purpose of the Study:
- To investigate the timing and geometric patterns of craniofacial growth.
- To identify specific growth variations associated with different vertical facial types and anteroposterior (A-P) skeletal classes.
Main Methods:
- Utilized Bayesian modeling of cephalometrics and geometric morphometric analyses.
- Analyzed a longitudinal dataset of 15,407 cephalograms from 1,913 individuals (ages 2-31).
- Classified individuals into vertical facial types (hyper-, normo-, hypo-divergent) and A-P skeletal classes (I, II, III) based on adult cephalometric measurements.
Main Results:
- Craniofacial morphology and growth patterns showed greater similarity within vertical facial types compared to A-P classes.
- A-P class variations were observed to be nested within the variations of vertical types.
- Identified type-class-specific variations in growth rate and magnitude in distinct craniofacial regions.
Conclusions:
- Growth variations in specific craniofacial regions associated with type-class categories can serve as clinical targets for treating complex skeletal malocclusions.
- This study provides a clearer understanding of the developmental basis for craniofacial form variation.
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