Person identification by means of a single unique dental feature. 
The combination of restorative procedures, developmental or acquired defects, or abnormalities of teeth enables the forensic dentist to make a meaningful comparison of ante- and postmortem data in search of the identity of a person.  Dental records are not always sufficiently accurate to supply 12 concordant points from which a positive identification can be made.  Under certain circumstances a single feature may be so extraordinary or unique that it alone can be sufficient to make a positive identification.  Two cases of identification in which only one unique feature was used are reported.