What is chain-of-custody and why is it critical in forensic odontology cases?

• A. Documentation of all handling and transfer of dental evidence to ensure admissibility and prevent contamination or tampering.
• B. A method for extracting DNA from dental pulp.
• C. A process to measure enamel thickness.
• D. The practice of storing teeth in alcohol for long-term preservation.

Answer: (A)

Chain-of-custody is the documented, chronological log of who has possessed dental evidence, what was done to it, and where it has been stored from the moment it is collected to when it is presented in court. This record captures every transfer, handling step, packaging, labeling, and storage condition, with dates and signatures. It matters in forensic odontology because it protects the evidence’s integrity and authenticity, showing that it has not been altered, contaminated, or substituted. In bite-mark analysis, dental-record comparisons, and even DNA work from dental tissues, having a solid chain-of-custody makes the evidence admissible and credible, since gaps or poor documentation can cast doubt on reliability and lead to challenges in court. The other choices describe techniques or preservation methods rather than the essential evidentiary log that ensures proper handling and integrity.