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https://hdl.handle.net/2440/43871
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Type: | Journal article |
Title: | Strong genetic control of emergence of human primary incisors |
Author: | Hughes, T. Bockmann, M. Seow, W. Gotjamanos, T. Gully, N. Richards, L. Townsend, G. |
Citation: | Journal of Dental Research, 2007; 86(12):1160-1165 |
Publisher: | Inter Amer Assoc Dental Research |
Issue Date: | 2007 |
ISSN: | 0022-0345 1544-0591 |
Statement of Responsibility: | T.E. Hughes, M.R. Bockmann, K. Seow, T. Gotjamanos, N. Gully, L.C. Richards, and G.C. Townsend |
Abstract: | Our understanding of tooth eruption in humans remains incomplete. We hypothesized that genetic factors contribute significantly to phenotypic variation in the emergence of primary incisors. We applied model-fitting to data from Australian twins to quantify contributions of genetic and environmental factors to variation in timing of the emergence of human primary incisors. There were no significant differences in incisor emergence times between zygosity groups or sexes. Emergence times of maxillary central incisors and mandibular lateral incisors were less variable than those of maxillary lateral incisors and mandibular central incisors. Maxillary lateral incisors displayed significant directional asymmetry, the left side emerging earlier than the right. Variation in timing of the emergence of the primary incisors was under strong genetic control, with a small but significant contribution from the external environment. Estimates of narrow-sense heritability ranged from 82 to 94% in males and 71 to 96% in females. |
Keywords: | genetic twins teeth eruption asymmetry |
Description: | Copyright © 2007 International and American Associations for Dental Research |
DOI: | 10.1177/154405910708601204 |
Published version: | http://jdr.iadrjournals.org/cgi/content/abstract/86/12/1160 |
Appears in Collections: | Aurora harvest 6 Dentistry publications |
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