Preservation of dental evidence following exposure to high temperatures

Abstract

The success of the Disaster Victim Identification (DVI) process relies upon sufficient post-mortem data being recovered to allow for a meaningful comparison with ante-mortem records of the missing person. Human bodies subjected to prolonged high temperatures, as experienced during the Black Saturday bushfires in Victoria, are often reduced to fragile skeletal elements. The dental structures, however, are the most durable tissues of the body and often survive these prolonged high temperatures. Without protecting the fragile remains at the scene and during transportation to the mortuary, disruption of the skeletal and dental elements may occur. This disruption will result in difficulties in obtaining post-mortem evidence and lead to problems during the reconciliation (formal identification) phase of the investigation. In the two case reports presented to illustrate these problems, there was significant loss and degradation of dental structures at the scene and during transportation to the mortuary. In the first case described, where no protection was afforded to the remains, total loss of all anatomical dental structures occurred. In the second case, where protection of the structures was undertaken, vital dental evidence was preserved. As a result of the experience in this particular DVI incident, where remains were exposed to prolonged high temperature and physical damage, new protocols have been formulated. Adherence to these protocols will maximise the recovery and preservation of dental evidence at the scene and during transportation to the mortuary.