Enamel thickness and growth rates in modern human permanent first molars over a 2000 year period in Britain

Datos Bibliográficos

ID8313270
AutoresChristopher Aris (0000-0002-4735-8275, Human Osteology Lab, Skeletal Biology Research Centre School of Anthropology and Conservation, University of Kent Canterbury UK, autor de correspondencia), P Mahoney (0000-0002-2715-3096, University of Kent), Mackie C O’hara (0000-0002-1221-0668, Department of Anthropology The Ohio State University Columbus Ohio), Chris Deter (Human Osteology Lab, Skeletal Biology Research Centre School of Anthropology and Conservation, University of Kent Canterbury UK)
Año2020
Volumen173
Número1
Páginas141-157
Fecha de publicación2020-09-01
Peer ReviewedSí
Open AccessSí
TipoARTICLE
RevistaAmerican Journal of Physical Anthropology (JOURNAL)
Identificadores de la revistaISSN: 0002-9483 • E-ISSN: 1096-8644
EditorialWiley (PUBLISHER • GB)
DOI10.1002/ajpa.24026
PMID32078160
OpenAlexW3007675260
IdiomaEN
Citas recibidas4
Referencias citadas72

OBJECTIVES: This study explores variation and trends in first molar enamel thickness and daily enamel secretion rates over a 2000 year period in Britain. METHODS: Permanent first molars (n = 89) from the Roman, Anglo-Saxon, and Medieval periods, as well as modern-day Britain, were analyzed using standard histological methods. Relative enamel thickness (RET) and linear measurements of cuspal and lateral thickness were calculated for mesial cusps. Daily secretion rates (DSRs) were calculated for inner, mid, and outer enamel regions in both cuspal and lateral enamel. Significant differences and trends were identified between samples using nonparametric statistical tests. RESULTS: Enamel thickness differed between some populations, but no temporal trends were identified. Early Anglo-Saxon molars had significantly thinner RET than both Late Anglo-Saxon (p < .00) and Medieval (p < .00) molars. Lateral enamel from the Roman molars was significantly thinner than the modern-day sample (p = .04). In contrast, a significant slowing trend in DSRs was observed across the more ancient to modern-day samples in every measured region except the mid-lateral enamel region. DISCUSSION: This study presents the first evidence for a gradual slowing in the daily rate that enamel is secreted in molars over the past 2000 years in Britain. However, this trend was not matched by consistent or significant positive or negative shifts in enamel thickness. These findings suggest that modern human molars of similar enamel thickness, from different modern and ancient populations, formed at different rates

Dental enamel · Enamel paint · Molar · Archaeology and ancient environmental studies · Dentistry · Forensic Anthropology and Bioarchaeology Studies · Medicine · Orthodontics · Pleistocene-Era Hominins and Archaeology