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18-Year Threshold

Definition

The legal age at which a person transitions from child to adult in most jurisdictions, triggering different rights, protections, and legal exposure. The most consequential single point in living-person dental age assessment.

Related terms

AGFAD
Arbeitsgemeinschaft für Forensische Altersdiagnostik (Study Group for Forensic Age Diagnostics), the German scientific body that issues internationally influential consensus recommendations on age...
Benefit of the Doubt Principle
In age assessment, the principle that when the estimated age range spans a legal threshold (typically 18 years), the subject should be...
Probabilistic Reporting
The practice of stating a dental age estimate as a range with an associated probability (e.g. a 95% confidence interval) rather than...
Third-Molar Staging
Application of Demirjian or similar staging systems to the third molar as the sole developmental indicator available after age 14. Its high...
Unaccompanied Minor
A person under 18 who is outside their country of origin and not accompanied by a parent or legal guardian. The legal...

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