Is Demirjian's original method really useful for age estimation in a forensic context?

Area of Science:

• Forensic Anthropology
• Odontology
• Human Biology

Background:

• Forensic age estimation is crucial in legal contexts.
• Demirjian's method is a widely used dental age assessment technique.
• Previous studies have questioned the reliability of Demirjian's method across diverse populations.

Purpose of the Study:

• To evaluate the accuracy and reliability of Demirjian's original method for forensic age estimation.
• To assess the suitability of this method in a sample of Portuguese children aged 6-16 years.

Main Methods:

• 564 panoramic radiographs of Portuguese children (6-16 years) were analyzed.
• Dental age (DA) was determined using Demirjian's method and compared to chronological age (CA).
• Statistical analyses included paired t tests and 94% confidence intervals for age estimation accuracy.

Main Results:

• Chronological age was systematically overestimated in both boys and girls across most age groups.
• Statistically significant differences between CA and DA were observed, except for 7-year-old boys.
• Confidence intervals frequently failed to include the true chronological age, indicating poor precision.

Conclusions:

• Demirjian's original method exhibits significant bias and inaccuracy for forensic age estimation in Portuguese children.
• The findings support existing evidence suggesting the method's unsuitability for reliable age assessment.
• The study recommends reconsidering or abandoning Demirjian's method for forensic purposes due to its limitations.