Ohtani S, Yamada Y, Yamamoto I
Department of Forensic Dental Medicine, Kanagawa Dental College, Yokosuka, Japan.
J Forensic Odontostomatol. 1997 Jun;15(1):9-12.
The racemization ratio (D/L ratio) of aspartic acid was determined in soluble peptide and total amino acid extracted from the dentine of experimentally-heated and unheated teeth. The ratio was higher in heated than in unheated teeth for total amino acid, but approximately the same for soluble peptide. Although the estimated age for total amino acid was much greater than the true age for heated teeth, it was approximately the same for total amino acid in unheated teeth and for soluble peptide in heated teeth and unheated teeth. These results suggest that age calculated from the D/L ratio of dentinal soluble peptide from burned bodies is sufficiently accurate for this parameter to be used to estimate age in teeth from burned bodies.
测定了从经实验加热和未加热牙齿的牙本质中提取的可溶性肽和总氨基酸中天冬氨酸的消旋化率（D/L 比）。对于总氨基酸，加热牙齿中的该比率高于未加热牙齿，但可溶性肽的比率大致相同。尽管总氨基酸的估计年龄比加热牙齿的真实年龄大得多，但未加热牙齿中的总氨基酸以及加热和未加热牙齿中的可溶性肽的估计年龄大致相同。这些结果表明，根据烧焦尸体牙本质可溶性肽的 D/L 比计算出的年龄足够准确，该参数可用于估计烧焦尸体牙齿的年龄。
