The Role of Polymorphisms Associated with Early Tooth Eruption in Dental and Occlusal Traits in East Asian Populations

Overview

Journal Korean J Orthod

Date 2014 Apr 4

PMID 24696826

Citations 1

Authors

Tetsutaro Yamaguchi

Akira Kawaguchi

Yong-Il Kim

Shugo Haga

Koshu Katayama

Hajime Ishida

Soo-Byung Park

Koutaro Maki

Ryosuke Kimura

Affiliations

Soon will be listed here.

Abstract

Objective: A recent study suggested that rs6504340, a polymorphism within the homeobox B (HOXB) gene cluster, is associated with the susceptibility for malocclusions in Europeans. The resulting malocclusions require orthodontic treatment. The aim of this study was to investigate the association of rs6504340 and other dentition-implicated polymorphisms with dental and occlusal traits in Korean and Japanese populations.

Methods: The study participants included 223 unrelated Koreans from the Busan area and 256 unrelated Japanese individuals from the Tokyo metropolitan area. DNA samples were extracted from saliva specimens. Genotyping for rs6504340 and four single nucleotide polymorphisms (SNPs) that have been shown to be associated with the timing of first tooth eruption and the number of teeth at 1 year of age (rs10506525, rs1956529, rs9674544, and rs8079702) was performed using TaqMan assays. The Index of Orthodontic Treatment Need (IOTN), overjet, overbite, arch length discrepancy, crown sizes, and length and width of the dental arches were measured. Spearman's correlation coefficients were calculated to evaluate relationships between rs6504340 and these dental/occlusal traits.

Results: We evaluated the aesthetic components and dental health components of the IOTN in the Korean and Japanese populations and found that neither rs6504340 nor the other four SNPs showed any association with dental and occlusal traits in these East Asian populations.

Conclusions: These negative results suggest that further research is needed to identify the genetic determinants of malocclusions in order to reach a consensus.

Citing Articles

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PMID: 31270966 PMC: 6687643. DOI: 10.1002/mgg3.835.

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