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Dental anthropology of a Brazilian sample: Frequency of nonmetric traits

Tinoco, Rachel Lima Ribeiro, Lima, Laíse Nascimento Correia, Delwing, Fábio, Francesquini Jr., Luiz, Daruge Jr., Eduardo
Forensic science international 2016 v.258 pp. 102.e1
ancestry, anthropology, grandparents, humans, sexual dimorphism, Brazil
Dental elements are valuable tools in a study of ancient populations and species, and key-features for human identification; among the dental anthropology field, nonmetric traits, standardized by ASUDAS, are closely related to ancestry. This study aimed to analyze the frequency of six nonmetric traits in a sample from Southeast Brazil, composed by 130 dental casts from individuals aged between 18 and 30, without foreign parents or grandparents. A single examiner observed the presence or absence of shoveling, Carabelli's cusp, fifth cusp, 3-cusped UM2, sixth cusp, and 4-cusped LM2. The frequencies obtained were different from the ones shown by other researches to Amerindian and South American samples, and related to European and sub-Saharan frequencies, showing the influence of this groups in the current Brazilian population. Sexual dimorphism was found in the frequencies of Carabelli's cusp, 3-cusped UM2, and sixth cusp.