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Teeth

Teeth

The formation of teeth, also known as odontogenesis, is a complex process that begins in utero, around the sixth week of embryonic development. There are three stages to this process: the bud stage, the cap stage, and the bell stage.
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin...

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Optimized Bone Sampling Protocols for the Retrieval of Ancient DNA from Archaeological Remains

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Forensic Dental Age Estimation: Development of New Algorithm Based on the Minimal Necessary Databases.

Monika Bjelopavlovic¹, Ann-Katrin Zeigner², Jochen Hardt³

¹Department of Prosthetic Dentistry, University Medical Center of the Johannes Gutenberg-University Mainz, Augustusplatz 2, 55131 Mainz, Germany.

Journal of Personalized Medicine

|August 26, 2022

Summary

Accurate dental age estimation for legal and clinical purposes is crucial. This study found that using mandibular wisdom teeth (38 and 48) with Demirjian staging offers more precise age prediction than other methods.

Keywords:

Demirjian staging dental age estimation forensic expert layperson wisdom teeth

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Area of Science:

Forensic Odontology
Anthropology
Radiology

Background:

Dental age determination is vital for legal and clinical contexts.
Wisdom teeth development stages are commonly used for age estimation.
Current methods may lack precision, especially with missing wisdom teeth.

Purpose of the Study:

To evaluate the Demirjian staging method for dental age estimation.
To compare the accuracy of using all four wisdom teeth versus individual teeth.
To assess the impact of agenesis or absence of wisdom teeth on age determination.

Main Methods:

385 orthopantomograms of male patients aged 11-22 years were analyzed.
Demirjian staging (A-H) was applied to all present wisdom teeth (18, 28, 38, 48).
Regression analysis was used to correlate tooth mineralization with chronological age.

Main Results:

Mineralization of wisdom teeth showed a linear relationship with age (p < 0.01), except for tooth 18.
Mandibular wisdom teeth (38, 48) provided more accurate age predictions (R² ≥ 0.50) than maxillary teeth.
Specific formulas for teeth 38 and 48 were derived for improved clinical application.

Conclusions:

Mandibular wisdom teeth (38, 48) are recommended for dental age estimation using Demirjian staging.
The study proposes specific regression formulas for precise age determination.
Accurate age estimation is achievable even with the absence of some wisdom teeth.