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A Finite Element Approach for Locating the Center of Resistance of Maxillary Teeth
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Compensatory interactions between developing maxillary anterior teeth in a sample of twins
Marianne Tadros1, Alan H Brook2, Sarbin Ranjitkar1
1Adelaide Dental School, The University of Adelaide, Adelaide, SA, Australia.
Archives of Oral Biology
|November 6, 2018
Summary
Developmental variations in lateral incisors affect adjacent tooth size. Maxillary central incisors and canines showed larger dimensions when lateral incisors were missing or small, supporting compensatory interactions in dental development.
Area of Science:
- Dental development
- Human genetics
- Morphogenesis
Background:
- Sofaer et al. (1971) proposed compensatory interactions between maxillary anterior teeth during development.
- Understanding these interactions is crucial for comprehending the complex system of dental development.
Purpose of the Study:
- To investigate developmental compensation in permanent maxillary central incisors and canines.
- To determine if final tooth size is influenced by adjacent missing or microdont lateral incisors.
Main Methods:
- Utilized a 2D image analysis system to measure crown dimensions (height, labiopalatal width, mesiodistal width) of permanent maxillary central incisors and canines.
- Analyzed dental study models from twins in a longitudinal dental development study.
Main Results:
- Individuals with one missing lateral incisor and one of average dimensions exhibited significantly larger central incisors (MDl and MDi dimensions, p < 0.05).
- Most monozygotic (6/7) and dizygotic (13/14) twin pairs were discordant for maxillary anterior hypodontia and microdontia, suggesting complex inheritance patterns.
Conclusions:
- The study provides evidence supporting Sofaer and colleagues' hypotheses on developmental interactions in the maxillary anterior region.
- These interactions are part of a complex adaptive system influenced by genetic, epigenetic, and environmental factors.
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