Differences in the D/L aspartic acid ratios in dentin among different types of teeth from the same individual and estimated age
| Autor: | Toshiharu Yamamoto, Rei Ito, Susumu Ohtani |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Molar
Cuspid Dentistry Oral cavity Mandibular first molar Pathology and Forensic Medicine Mandibular second molar L-Aspartic acid stomatognathic system Dentin medicine Humans Bicuspid Racemization Aged Aged 80 and over Aspartic Acid Chemistry business.industry D-Aspartic Acid Age Factors Stereoisomerism Middle Aged Dentin Formation Incisor stomatognathic diseases medicine.anatomical_structure Age Determination by Teeth business Forensic Dentistry |
| Zdroj: | International Journal of Legal Medicine. 117:149-152 |
| ISSN: | 1437-1596 0937-9827 |
| DOI: | 10.1007/s00414-003-0365-8 |
| Popis: | We have studied the correlation between the level of D-aspartic acid in dentin and the period of dentin formation in different types of teeth from the same individual. Except for the third molar, it is generally agreed that the formation of permanent dentin follows the pattern of growth, occurring earliest in the first molar and last in the second molar. In middle-aged individuals, racemization among the different types of teeth was highest in the first molar, corresponding to the earliest period of dentin formation. In elderly individuals, however, racemization tended to be highest in the second molar, in which dentin is formed last during growth. It is assumed that this may be due to the higher ambient temperature of the second molars, which are located deeper in the oral cavity. Thus, these results suggest that in elderly individuals racemization in teeth that have been situated deep in the oral cavity for a long time is more influenced by the environment than by the period of tooth formation. |
| Databáze: | OpenAIRE |
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