Amino Acid Racemization from Tooth for Age Estimation- An Overview

Muhammed, Ajmal (2012) Amino Acid Racemization from Tooth for Age Estimation- An Overview. Malaysian Journal of Forensic Sciences, 3 (1). pp. 41-45. ISSN 2180-1126

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Abstract

Age estimation constitutes an important factor in identification of individual in forensic odontology. Out of the various methods used, Amino acid racemization (AAR) is the most reliable one. AAR occurs in tissues with low metabolic turn over. As age advances L-amino acid change to D-amino acid, and their ratio represents age. Amino acid racemization method has a historical background of over three decades. Since most of the methods used in forensic odontology age estimation were based on structural changes of teeth, racemization becomes the newer method by its chemical approach. In general racemization of amino acid follows a first order reversible rate law; L- amino acid KL/KD D- amino acid where KL and KD are the first order rate constant of the interconversion of L and D amino acid enantiomers. Amino acid from dentin as well as from enamel is tried for racemization study. Several studies were conducted in this field and most of it had an age prediction range of less than ± 3 years. Advantage of using this method is that minute amount of tooth sample is well enough to perform this technique. This paper highlights an overall view of AAR method with relates to age.

Item Type: Article
Subjects: Dentistry
Medicine and Surgery
Divisions: College of Dentistry > Dentistry
Depositing User: DR MUHAMMED AJMAL
Date Deposited: 04 Nov 2015 19:12
Last Modified: 04 Nov 2015 19:12
URI: http://eprints.kku.edu.sa/id/eprint/96

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