title: Sex estimation using diagonal diameter measurements of molar teeth in African American populations.
abstract: Teeth are often recovered in forensic cases due to their postmortem longevity. The goal of the present research was to investigate the degree of sexual dimorphism in the permanent molars of African Americans using crown and cervical diagonal diameters. Discriminant functions developed from a modern Greek population were tested for accuracy of sex estimation in an African American population. One hundred and three (53 males and 50 females) individuals ranging in age from 16 years to 66 years old were used from the Robert J. Terry Anatomical Skeletal Collection. Four diagonal diameter measurements were taken for each of the left mandibular and maxillary molars: mesiobuccal-distolingual crown diameter, mesiolingual-distobuccal crown diameter, mesiobuccal-distolingual cervical diameter, and mesiolingual-distobuccal cervical diameter. The overall percentage of accuracy of the modern Greek discriminant functions when applied to the African American sample was between 53.8% and 63.6%. Males were more accurately classified (93.6%-100%) than females (0%-18.2%). The African American population specific direct discriminant functions showed accuracy rates from 72.6% to 100% for the original data and 40%-72.3% for the cross-validated data. The African American stepwise discriminant functions showed accuracy rates from 63.9% to 77.6% for the original and cross-validated data. Comparisons to other populations were made. The results suggest that, in teeth, there is variation in the degree of sexual dimorphism between populations and discriminant functions for sex estimation in dentition are population specific.
authors.affiliation: Forensic Sciences Program, Department of Anthropology, Saint Mary's University, 923 Robie Street, Halifax, Nova Scotia B3H 3C3, Canada. Electronic address: tanya.peckmann@smu.ca.
authors.forename: Tanya R
authors.initials: TR
authors.lastname: Peckmann
authors.affiliation: Department of Biology, Saint Mary's University, Halifax, Nova Scotia B3H 3C3, Canada. Electronic address: susan.meek@smu.ca.
authors.forename: Susan
authors.initials: S
authors.lastname: Meek
authors.affiliation: Department of Anthropology, Saint Mary's University, Halifax, Nova Scotia B3H 3C3, Canada. Electronic address: natasha.dilkie@gmail.com.
authors.forename: Natasha
authors.initials: N
authors.lastname: Dilkie
authors.affiliation: Department of Anthropology, Saint Mary's University, Halifax, Nova Scotia B3H 3C3, Canada. Electronic address: mussettm@gmail.com.
authors.forename: Michelle
authors.initials: M
authors.lastname: Mussett
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D044383:Black People; D016002:Discriminant Analysis; D005260:Female; D005553:Forensic Dentistry; D006801:Humans; D008297:Male; D008875:Middle Aged; D008963:Molar / Q000033:anatomy & histology*; D012727:Sex Characteristics; D055815:Young Adult; D001741:Black or African American
keywords: African Americans; Diagonal diameters; Discriminant functions; Forensic anthropology population data; Molar teeth; Sex estimation