Skip navigation
Please use this identifier to cite or link to this item:
Files in This Item:
File Description SizeFormat 
ARTIGO_DentalOcclusionSplit.pdf355,29 kBAdobe PDFView/Open
Full metadata record
DC FieldValueLanguage
dc.contributor.authorNormando, Antonio David Corrêa-
dc.contributor.authorFaber, Jorge-
dc.contributor.authorGuerreiro, João Farias-
dc.contributor.authorQuintão, Cátia Cardoso Abdo-
dc.identifier.citationNORMANDO, David et al. Dental occlusion in a split Amazon indigenous population: genetics prevails over environment. Plos One, v. 6, n. 12, dez. 2011. Disponível em: <>. Acesso em: 6 set. 2013.en
dc.description.abstractBackground: Studies examining human and nonhuman primates have supported the hypothesis that the recent increase in the occurrence of misalignment of teeth and/or incorrect relation of dental arches, named dental malocclusion, is mainly attributed to the availability of a more processed diet and the reduced need for powerful masticatory action. For the first time on live human populations, genetic and tooth wear influences on occlusal variation were examined in a split indigenous population. The Arara-Iriri people are descendants of a single couple expelled from a larger village. In the resultant village, expansion occurred through the mating of close relatives, resulting in marked genetic cohesion with substantial genetic differences. Methodology/Principal Findings: Dental malocclusion, tooth wear and inbreeding coefficient were evaluated. The sample examined was composed of 176 individuals from both villages. Prevalence Ratio and descriptive differences in the outcomes frequency for each developmental stage of the dentition were considered. Statistical differences between the villages were examined using the chi-square test or Fisher’s exact statistic. Tooth wear and the inbreeding coefficient (F) between the villages was tested with Mann-Whitney statistics. All the statistics were performed using two-tailed distribution at p#0.05. The coefficient inbreeding (F) confirmed the frequent incestuous unions among the Arara-Iriri indigenous group. Despite the tooth wear similarities, we found a striking difference in occlusal patterns between the two Arara villages. In the original village, dental malocclusion was present in about one third of the population; whilst in the resultant village, the occurrence was almost doubled. Furthermore, the morphological characteristics of malocclusion were strongly different between the groups. Conclusions/Significance: Our findings downplay the widespread influence of tooth wear, a direct evidence of what an individual ate in the past, on occlusal variation of living human populations. They also suggest that genetics plays the most important role on dental malocclusion etiology.en
dc.rightsAcesso Abertoen
dc.titleDental occlusion in a split Amazon indigenous population : genetics prevails over environmenten
dc.subject.keywordOclusão (Odontologia)en
dc.subject.keywordÍndios da América do Sul - Brasilen
dc.rights.license© 2011 Normando et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Fonte: Acesso: 6 set. 2013.en
Appears in Collections:ODT - Artigos publicados em periódicos

Show simple item record Recommend this item " class="statisticsLink btn btn-primary" href="/handle/10482/14097/statistics">

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.