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Enamel daily secretion rates of deciduous molars from a global sample of children

McFarlane, Gina, Loch, Carolina, Guatelli-Steinberg, Debbie, Bayle, Priscilla, Le Luyer, Mona, Sabel, Nina, Nava, Alessia, Floyd, Bruce, Skinner, Mark F., White, Sophie, and others. (2021) Enamel daily secretion rates of deciduous molars from a global sample of children. Archives of Oral Biology, . Article Number 105290. ISSN 0003-9969. (doi:10.1016/j.archoralbio.2021.105290) (KAR id:90850)

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Objective: To investigate and describe the variation in enamel daily secretion rates (DSRs) of naturally exfoliated deciduous molars (n = 345) from five modern-day populations (Aotearoa New Zealand, Britain, Canada, France, and Sweden).

Design: Each tooth was thin sectioned and examined using a high-powered Olympus BX51 microscope and DP25 digital microscope camera. Mean DSRs were recorded for the inner, mid, and outer regions of cuspal and lateral enamel, excluding enamel nearest the enamel-dentin junction and at the outermost crown surface.

Results: Mean DSRs did not vary significantly between populations, or by sex. Cuspal enamel grew slightly faster than lateral enamel (mean difference 0.16 µm per day; p < 0.001). The trajectory of DSRs remained relatively constant from inner to outer cuspal enamel and increased slightly in lateral enamel (p = 0.003).

Conclusions: The DSRs of deciduous molars from modern-day children are remarkably consistent when compared among populations. While growth rates are faster in cuspal than lateral enamel, the trajectory of enamel formation changes only slightly from inner to outer regions. The trajectory of DSRs for deciduous molars differs to that of permanent molar enamel, which typically display a steep increase in matrix deposition from inner to outer enamel.

Item Type: Article
DOI/Identification number: 10.1016/j.archoralbio.2021.105290
Uncontrolled keywords: daily secretion rates; dental development; enamel formation; cross striations; deciduous molars; incremental growth
Subjects: H Social Sciences
Q Science > QH Natural history > QH301 Biology
Divisions: Divisions > Division of Human and Social Sciences > School of Anthropology and Conservation
Depositing User: Patrick Mahoney
Date Deposited: 14 Oct 2021 07:45 UTC
Last Modified: 14 Oct 2022 23:00 UTC
Resource URI: (The current URI for this page, for reference purposes)
McFarlane, Gina:
Le Luyer, Mona:
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