Figure 2 - An example of the comparison of postmortem and antemortem radiographs to determine identity.
From the following article
I A Pretty & D Sweet
British Dental Journal 190, 359 - 366 (2001) Published online: 14 April 2001
doi:10.1038/sj.bdj.4800972

The pattern, shapes and sizes of individual dental treatments present in one record are compared with similar traits and characteristics in the other record. In this case it was determined that the records originated from the same person. This established a positive identification. Note that there are several discrepancies present, (eg endodontic treatment of teeth LR5 (45) and LR6(46) in the postmortem record) but these can be explained as a result of the time interval between the two records and the additional dental treatments performed during this period
