title: Similarity and match rates of the human dentition in three dimensions: relevance to bitemark analysis.
abstract: Uniqueness of the human dentition is a fundamental premise in bitemark analysis. Despite the importance of this key aspect of bitemark methodology, systematic studies of large populations have been limited. Furthermore, there have been no investigations of the significance of the third dimension with regard to dental uniqueness. One hundred digitally scanned mandibular models were analyzed in both 2D and three dimension (3D) using Landmark software. Additionally, 500 3D maxillary and mandibular sets were investigated for determining dental match rate. Statistical analysis was performed with geometric morphometric methods. Results show that measurements in 3D preserve more information about the dentition, reducing but not eliminating random matches in a sample population of 100 mandibular dentitions. Examination of pairs of maxillary and mandibular dentitions showed a substantial number of random matches (197 maxillary, 51 mandibular, one of both maxillary and mandibular). Conclusions indicate that a zero match rate cannot be claimed for the population studied.
authors.affiliation: Laboratory for Forensic Odontology Research, School of Dental Medicine, SUNY at Buffalo, S. Campus, Buffalo, NY 14214, USA. bushma@buffalo.edu
authors.forename: Mary A
authors.initials: MA
authors.lastname: Bush
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Bush
authors.forename: H David
authors.initials: HD
authors.lastname: Sheets
mesh_terms: D001734:Bites, Human / Q000473:pathology*; D003817:Dentition; D005553:Forensic Dentistry / Q000379:methods*; D006801:Humans; D021621:Imaging, Three-Dimensional; D007834:Lasers; D008334:Mandible / Q000033:anatomy & histology; D008437:Maxilla / Q000033:anatomy & histology
references.citation: Forensic Sci Int. 2006 May 15;159 Suppl 1:S110-20
references.pmid: 16540273
references.citation: J Forensic Sci. 2011 May;56(3):621-6
references.pmid: 21361951
references.citation: J Forensic Sci. 2011 Jan;56(1):118-23
references.pmid: 20735705
references.citation: Science. 2005 Aug 5;309(5736):892-5
references.pmid: 16081727
references.citation: J Forensic Sci. 2007 May;52(3):671-7
references.pmid: 17397505
references.citation: J Forensic Sci. 2006 May;51(3):624-9
references.pmid: 16696711
references.citation: Int J Legal Med. 2007 Jan;121(1):9-17
references.pmid: 16391946
references.citation: Forensic Sci Int. 2003 Aug 12;135(2):115-21
references.pmid: 12927412
references.citation: Sci Justice. 2001 Apr-Jun;41(2):85-92
references.pmid: 11393946