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3D-Geomorphometrics tooth shape analysis in hypodontia.
Ibrahim Al-Shahrani1, Wendy Dirks2, Nicholas Jepson2
1Division of Orthodontics, Department of Preventive Dental Sciences, College of Dentistry, King Khalid University Abha, Saudi Arabia.
Frontiers in Physiology
|May 6, 2014
Summary
This study used 3D imaging to analyze tooth shape in hypodontia patients, finding significant differences correlated with hypodontia severity. These quantitative tooth morphology measurements can aid in managing hypodontia.
Area of Science:
- Dentistry
- Anthropology
- Medical Imaging
Background:
- Tooth morphology assessment is crucial for diagnosing and managing hypodontia.
- Previous 2D studies offered limited insights into tooth shape anomalies in hypodontia.
- 3D surface imaging provides a more comprehensive analysis of tooth form.
Purpose of the Study:
- To evaluate tooth form differences between hypodontia and control patients using 3D surface imaging and statistical shape analysis.
- To investigate the relationship between hypodontia severity and tooth morphology variations.
- To explore sex-based differences in tooth crown shape within hypodontia groups.
Main Methods:
- Recorded 18 anatomical landmarks on the lower left first permanent molar from 3D scanned models.
- Included 120 hypodontia patients (mild, moderate, severe) and 40 controls.
- Utilized Procrustes analysis, principal component analysis (PCA), allometric analysis, and MANOVA for statistical evaluation.
Main Results:
- Significant differences in tooth crown shape were observed between hypodontia patients and controls (p < 0.0001).
- Tooth form variation was proportional to the severity of hypodontia.
- Significant shape differences were also found between sexes (p < 0.0001).
Conclusions:
- Quantitative tooth shape analysis using 3D imaging offers valuable insights into hypodontia.
- Findings enhance the multidisciplinary management of hypodontia patients.
- Tooth morphology variations are linked to hypodontia severity and sex.
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