1. Analysis of 14C and 13C in teeth provides precise birth dating and clues to geographical origin 
K. Alkass, B.A. Buchholz, H. Druid, K.L. Spalding 
Forensic Science International 
Volume 209, Issue 1, Pages (June 2011)
DOI: /j.forsciint
Copyright © 2010 Elsevier Ireland Ltd Terms and Conditions

2. Fig. 1
Schematic illustration of the principle for the birthdating of teeth using analysis of bomb pulse derived 14C. The red dot represents a tooth with a radiocarbon value matching the rising part of the curve at The angled arrow represents the time of enamel lay down for this particular tooth and ends at the broken vertical line (14C calculated DOB) adjacent to the actual DOB of the person. The green diamonds represent two different teeth (with different laydown times) from the same person, giving different 14C values, allowing for identification of which part of the bomb-curve a person was born. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of the article.)
Forensic Science International  , 34-41DOI: ( /j.forsciint )
Copyright © 2010 Elsevier Ireland Ltd Terms and Conditions

3. Fig. 2
(a) Radiocarbon analysis of teeth formed during the rising part of the bomb curve show a good correlation with actual formation time (R2=0.751). Note that the data represent the DOB of the person and not the date of enamel formation, with several subjects born before the bomb-spike. Raw data can be found in Table 2 and Supplemental Table 1. The two cases showing Δ14C values below −15 are excluded (see Section 4). (b) An excellent correlation was found between estimated and actual DOB regarding teeth formed after 1963 (R2=0.989). The data match Table 3 and raw data can be found in Supplemental Table 1.
Forensic Science International  , 34-41DOI: ( /j.forsciint )
Copyright © 2010 Elsevier Ireland Ltd Terms and Conditions

4. Fig. 3
Distribution of F14C values across the time curve. For teeth formed before 1959, the Hua and Barbetti dataset [10] was used as a reference. These results are given as Δ14C values, however values are shown here as F14C values for purposes of consistency. Please note that the squares and circles represent estimated and actual DOB of the teeth, not the individual.
Forensic Science International  , 34-41DOI: ( /j.forsciint )
Copyright © 2010 Elsevier Ireland Ltd Terms and Conditions