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Tooth shape asymmetry in post-canine dentition: Evidence-based morphometric insights
Srikant Natarajan1, Junaid Ahmed2, Shravan Shetty3
1Department of Oral Pathology and Microbiology, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education, Manipal, India.
Journal of Oral Biology and Craniofacial Research
|April 28, 2025
Summary
Dental asymmetry varies between sexes, with premolars and certain molars showing more asymmetry. Understanding this dental variation is crucial for diagnosis and treatment planning in dentistry.
Area of Science:
- Anthropology
- Dentistry
- Evolutionary Biology
Background:
- Investigates dental asymmetry in tooth shape and landmark locations.
- Examines variations in tooth anatomy between sexes.
Purpose of the Study:
- To evaluate dental symmetry and asymmetry in post-canine dentition.
- To analyze variations in anatomical landmarks between left and right sides of teeth.
Main Methods:
- Utilized 3D geometric morphometrics on 160 patients (aged 13-20).
- Focused on post-canine dentition, analyzing anatomical landmark variations.
Main Results:
- Significant shape differences were observed in most teeth, excluding the 3-cusp mandibular second premolar.
- Asymmetry was more pronounced in maxillary premolars and specific mandibular teeth (second premolar, first molar).
- No significant difference in centroid size was found between sexes.
Conclusions:
- Highlights the evolutionary significance of bilateral symmetry.
- Suggests fluctuating asymmetry may be linked to genetic or environmental factors.
- Emphasizes the importance of dental asymmetry knowledge for diagnosis and treatment planning in restorative dentistry and orthodontics.
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