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Mandible: An Indicator for Sex Determination - A Three-dimensional Cone-Beam Computed Tomography Study
Anas Salem Albalawi1, Mohammad Khursheed Alam2, Sudhakar Vundavalli1
1Department of Preventive Dentistry, College of Dentistry, Jouf University, Sakaka, Saudi Arabia.
Contemporary Clinical Dentistry
|February 5, 2020
Summary
Mandibular measurements using cone-beam computed tomography (CBCT) can help identify gender. Specific angles and distances from CBCT scans offer valuable anthropological data for forensic and dental applications.
Area of Science:
- Forensic Anthropology
- Radiology
- Anatomy
Background:
- The mandible is a robust bone frequently utilized for gender determination.
- Mandibular morphometry can be assessed using dry skulls, panoramic radiography, or cone-beam computed tomography (CBCT).
Purpose of the Study:
- To ascertain gender through mandibular measurements obtained via CBCT.
- To evaluate the efficacy of specific mandibular angles and distances in gender prediction.
Main Methods:
- Morphometric analysis of 200 CBCT scans using OnDemand 3D software.
- Measurement of angles and linear distances at key mandibular landmarks.
- Statistical analysis including independent samples t-test and discriminant function analysis for gender prediction.
Main Results:
- Analysis of angles (e.g., gonion to menton) and linear distances (e.g., gonion to gonion) revealed statistically significant differences between males and females.
- Discriminant function analysis using four mandibular variables achieved an overall gender prediction accuracy of 67%.
- The model demonstrated comparable accuracy for both male (66.7%) and female (67.3%) classification.
Conclusions:
- The angle formed by the intersection of lines from the left and right gonion to menton (Gn-M0) is a significant indicator for gender identification.
- These morphometric measurements provide valuable anthropological data applicable in dental and medicolegal contexts.
- CBCT-based mandibular morphometry offers a reliable method for gender determination in forensic investigations.
