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Contribution of dental tissues to sex determination in modern human populations
Author(s) -
GarcíaCampos Cecilia,
MartinónTorres María,
MartínFrancés Laura,
Martínez de Pinillos Marina,
ModestoMata Mario,
PereaPérez Bernardo,
Zanolli Clément,
Labajo González Elena,
Sánchez Sánchez José Antonio,
Ruiz Mediavilla Elena,
Tuniz Claudio,
Bermúdez de Castro José María
Publication year - 2018
Publication title -
american journal of physical anthropology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.146
H-Index - 119
eISSN - 1096-8644
pISSN - 0002-9483
DOI - 10.1002/ajpa.23447
Subject(s) - sexual dimorphism , dentition , permanent dentition , enamel paint , dentistry , biology , orthodontics , medicine , zoology
Objectives Accurate sex estimation is an essential step for the reconstruction of the biological profile of human remains. Earlier studies have shown that elements of the human permanent dentition are sexually dimorphic. The aims of this study are to determine the degree of sexual dimorphism in the dental tissue volumes and surface areas of mandibular canines and to explore its potential for reliable sex determination. Method The teeth included in this study ( n = 69) were selected from anthropological collections from Spain, South Africa and Sudan. In all cases, the sex of the individuals was known. The teeth were scanned and three‐dimensional (3D) measurements (volumes and surfaces areas) were obtained. Finally, a dsicriminant function analysis was applied. Results Our results showed that sexual dimorphism in canine size is due to males having greater amounts of dentine, whereas enamel volume does not contribute significantly to overall tooth size dimorphism. Classification accuracy of the multivariable equations tested on slightly worn teeth ranged from 78 to 90.2% for the crossvalidation, and from 71.43 to 84.62% for the hold‐out sample validation. When all functions were applied together, the sex was correctly assigned 92.30% of the time. Conclusions Our results suggest that the 3D variables from mandibular canine dental tissues are useful for sex determination as they present a high degree of dimorphism. The results obtained show the importance of 3D dental tissue measurements as a methodology in sex determination, which application should be considered as a supplemental method to others.