Please use this identifier to cite or link to this item:
Scopus Web of Science® Altmetric
Type: Journal article
Title: The effect of birthweight on tooth-size variability in twins
Author: Apps, M.
Hughes, T.
Townsend, G.
Citation: Twin Research and Human Genetics, 2004; 7(5):415-420
Publisher: Australian Academic Press Pty. Ltd.
Issue Date: 2004
ISSN: 1832-4274
Statement of
Mary V. B. Apps, Toby E. Hughes, Grant C. Townsend
Abstract: Studies indicate that low birthweight (LBW) children display reduced deciduous tooth size but there is little information about permanent tooth size. It has also been shown that dental fluctuating asymmetry (FA) increases in response to various environmental influences, but the relationship between birthweight and FA remains unclear. The aim of this study was to compare tooth size and asymmetry, according to birthweight, in the deciduous and permanent dentitions of a sample of Australian twins. The study sample comprised 436 twins, classified into 2 groups: normal birthweight (NBW > 2500g) and low birthweight (LBW ≤ 2500g). For each individual it was generally possible to measure maximum mesiodistal crown diameters of both deciduous and permanent central incisors from serial dental models. Correlations were calculated between tooth-size variables and birthweight; subsequently comparisons of tooth size and FA were made between the LBW and NBW samples using Student's t tests. Small positive correlations (around .1) were noted between birthweight and tooth-size variables. There was no evidence of tooth-size reduction in the LBW male sample, but the LBW females displayed tooth-size reduction of approximately 2–3% for both deciduous and permanent incisors, compared to the NBW females. There was no evidence of increased FA in the LBW individuals of either sex. These findings indicate that developing teeth are generally well-protected from developmental disturbances during prenatal and perinatal periods. Further research is needed to clarify the biological basis of an apparently true but weak association between tooth size and birthweight.
Keywords: Dentition, Permanent
Tooth, Deciduous
Birth Weight
Organ Size
Infant, Newborn
Infant, Low Birth Weight
Description: Copyright © 2004 Australian Academic Press
DOI: 10.1375/twin.7.5.415
Published version:
Appears in Collections:Aurora harvest 2
Dentistry publications

Files in This Item:
There are no files associated with this item.

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