Dental age assessment and dental scoring systems: combined different statistical methods

Area of Science:

• Forensic Anthropology
• Odontology
• Biometrics

Background:

• Dental age assessment aids in determining chronological age, particularly for individuals lacking birth records.
• Tooth eruption patterns are commonly used for dental age estimation.
• Developing population-specific standards is crucial for accurate age assessment.

Purpose of the Study:

• To create dental age estimation tables tailored for the Portuguese population.
• To evaluate various scoring systems and statistical approaches for third molar development.
• To establish a reliable protocol for dental age assessment in Portugal.

Main Methods:

• Analysis of 626 orthopantomograms (12-25 years old) from a Portuguese database.
• Assessment of all four third molars using multiple established scoring systems.
• Application of statistical methods to validate the age estimation accuracy.

Main Results:

• Validation demonstrated high precision and reproducibility across methods.
• Statistically significant differences between estimated and chronological ages were observed, indicating estimation errors.
• Kullman's and Mincer's methods showed the best applicability for third molar age estimation in the Portuguese sample.
• Reliability measures (sensitivity, specificity, accuracy) decreased with increasing age.

Conclusions:

• A combined scoring system protocol for dental age assessment was established for the Portuguese population.
• Population-specific tables for various scoring systems were generated.
• These tables provide a valuable tool for forensic and clinical age estimation in Portugal.