Age estimation in the living: Transition analysis on developing third molars.

Area of Science:

• Forensic Anthropology
• Radiographic Analysis
• Statistical Modeling

Background:

• Radiographic assessment of third molar development is key for forensic age estimation.
• Current methods using combined third molar scores are statistically complex due to trait correlation.

Purpose of the Study:

• To evaluate the performance of Transition Analysis (TA) for living individuals using a full set of third molar scores.
• To assess TA's accuracy and reliability in forensic age estimation.

Main Methods:

• Utilized a cross-sectional sample of 854 panoramic radiographs (ages 15.0-24.0).
• Randomly split the sample into reference and validation sets for TA application and testing.
• Applied TA to estimate age based on combined third molar developmental stages.

Main Results:

• Mean inaccuracy was approximately 1.8 years for both males and females.
• Mean bias was low (0.55 years in males, 0.31 years in females).
• 93.7% of males and 95.9% of females in the validation sample fell within the 95% prediction interval.

Conclusions:

• Transition Analysis (TA) provides unbiased age estimates for forensic purposes, minimizing misclassification of minors as adults.
• TA demonstrates good performance in differentiating minors from adults.
• TA has potential for enhanced accuracy and reproducibility with the inclusion of additional developmental traits.