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Permanent Maxillary Odontometrics for Sex Estimation Based on a 3-Dimensional Digital Method.
Jialin Liu1, Yanshi Liu2, Jian Wang3
1Department of Prosthodontics, The First Affiliated Hospital of Xinjiang Medical University, Affiliated Stomatological Hospital of Xinjiang Medical University, Stomatology Research Institute of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang, China (mainland).
Summary
Forensic sex estimation using 3D dental scans is reliable. Mesiodistal distance and crown area of maxillary teeth show significant sexual dimorphism, aiding identification in forensic medicine.
Area of Science:
- Forensic Anthropology
- Odontology
- Biometrics
Background:
- Sex estimation is crucial for personal identification in forensic medicine.
- Teeth, due to their durability, are vital for identification in challenging scenarios like mass disasters.
- 3D technology offers advanced methods for dental measurements and analysis.
Purpose of the Study:
- To apply 3D technology for odontometric analysis of permanent maxillary teeth.
- To investigate sexual dimorphism in dental measurements.
- To develop discriminant equations for sex estimation in the Han population of Kashgar.
Main Methods:
- Utilized 3D digital scanning of maxillary dental models from 204 participants (104 males, 100 females).
- Measured various odontometric parameters including buccolingual distance, mesiodistal distance, and crown area.
- Performed statistical analyses including t tests and discriminant analyses using IBM SPSS 23.0.
Main Results:
- High intra- and interexaminer reliability (ICC >0.950) confirmed measurement accuracy.
- Statistically significant sex-related differences (P<0.05) were observed.
- Mesiodistal distance and crown area demonstrated distinct sexual dimorphism, with males generally exhibiting larger measurements.
Conclusions:
- 3D digital technology provides a robust approach for odontometry in forensic applications.
- Mesiodistal distance and buccolingual distance, or the maxillary canine index, can serve as effective auxiliary tools for sex estimation.
- Developed discriminant functions offer practical utility for sex estimation in the studied population.
