Decline in enamel hypoplasia in relation to fluoridation in Australians

Corruccini, Robert S.; Townsend, Grant

doi:10.1002/ajhb.10216

Cited by 5 publications

(4 citation statements)

References 15 publications

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“…One non‐isotopic approach has been the use of linear enamel hypoplasia (LEH, non‐specific growth disruptions in enamel), the timing of which can be estimated by their spatial positions on teeth. Given the relatively early ages of LEH formation and the well‐known risks associated with weaning, the two have been logically linked (Goodman et al, ; Corruccini et al, ; Van Gerven et al, ; Ubelaker, ; Moggi‐Cecchi et al, ). Indeed, there is evidence linking childhood malnutrition and LEH, which coincide with general patterns of weaning in modern children (Goodman et al, ; May et al, ).…”

mentioning

confidence: 99%

Intra‐tooth stable isotope analysis of dentine: A step toward addressing selective mortality in the reconstruction of life history in the archaeological record

Sandberg

Sponheimer

Lee‐Thorp

et al. 2014

American J Phys Anthropol

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Intra-tooth stable isotope analysis of dentine provides a more sensitive means to examine infant and childhood life history in the past than conventional cross-sectional analyses that rely on age-at-death. In addition, reconstructions of early diet and life history using an intra-tooth approach circumvent potential problems associated with mortality bias, which may operate strongly during infancy and childhood. We present new intra-tooth stable carbon and nitrogen isotope profiles in dentine collagen of early forming permanent teeth in a sample of adults from the Medieval Nubian site of Kulubnarti. We interpret the profiles in terms of weaning behavior and dietary history, and we compare profiles generated from first molars and canines to explore the degree to which these tooth types correspond. We then compare the profiles to the occurrence of linear enamel hypoplasia to assess the relationship between the timing of the weaning process and stress events. Finally, we compare the longitudinal profiles to cross-sectional stable isotope data obtained from rib collagen to investigate how life histories might differ between those that survived into adulthood and those that did not. Results suggest that canine and first molar profiles are in broad agreement, that hypoplastic stress events occurred during rather than before or after the weaning process in our sample, and that survivors appear to have weaned earlier than the average non-survivor. We suggest that this approach may be useful for addressing the effects of selective mortality on reconstructions of early life history and the relationship between early life history and morbidity.

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mentioning

confidence: 99%

Intra‐tooth stable isotope analysis of dentine: A step toward addressing selective mortality in the reconstruction of life history in the archaeological record

Sandberg

Sponheimer

Lee‐Thorp

et al. 2014

American J Phys Anthropol

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“…There is clearly a difference (Corruccini and Townsend, 2003) in the sharply lowered hypoplasia frequencies in the later (born ca. 1990) twin cohort.…”

Section: Resultsmentioning

confidence: 94%

“…Nevertheless, one might expect environmental covariance to be channeled by similar genotypes, so a correlated response to environmental exposure could be possible. However, most "definite" hypoplasias (77%) are discordant between cotwins (Corruccini and Townsend, 2003), and the genetic variance of asymmetries is very low (Corruccini et al, 1988;Corruccini and Sharma, 1989).…”

Section: Methodsmentioning

confidence: 97%

Correspondence between enamel hypoplasia and odontometric bilateral asymmetry in Australian twins

Corruccini

Townsend

Schwerdt

2004

American J Phys Anthropol

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Four aspects of enamel hypoplasia of the maxillary central incisor and mandibular canine (hypoplasia presence, width, cumulative width, and crown position) were correlated with directional and fluctuating measures of bilateral odontometric asymmetry in a large panel (n = 950) of South Australian twins. Hypoplasia and asymmetry are thought to reflect general developmental disruption, but they show few correlations beyond the expected statistical type I error. This may relate to differences in their specific etiology, the composite nature of overall crown dimensions, a general lack of stress, and the extended period of formation of dental crowns. In contrast, asymmetry is marginally more detectable in a subsample separated according to hypoplastic teeth, suggesting that correspondence may be clearer in comparisons at the population rather than individual level. The most notable difference is the greater variability of asymmetry measures in hypoplastic individuals.

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“…Linear enamel hypoplasia (LEH) data are used in applied studies to reconstruct the timing, duration, and severity of stress events during the period of an individual's dental development (Goodman et al, 1980;Goodman & Rose, 1990;Guatelli-Steinberg et al, 2004;Hillson, 2014). This condition has received limited attention within a family study framework (but see Corruccini & Townsend, 2003;Floyd, 2007;Lukacs, 1991). Studies show LEH presence in siblings puts an individual at elevated risk for hypoplasia (Infante & Gillespie, 1974;Sweeney & Guzman, 1966) asymmetry (e.g., Bailit et al, 1970;Lalumière et al, 1999;Mihailidis et al, 2009;Schaefer et al, 2006).…”

Section: Getting Specific About "Environment"mentioning

confidence: 99%

Integrating genealogy and dental variation: contributions to biological anthropology

Paul

Feezell

Hughes

et al. 2022

American Journal of Biological Anthropology

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Genealogical samples that couple dental data and documented relatedness information provide unique opportunities to examine the biological foundations of tooth variation. Over the past century, these resources have been critical for examining the various factors that influence dental phenotypes-the same traits that anthropologists regularly apply to reconstructions of past phenomena. Genealogical samples are uniquely suited to test long-standing assumptions underlying bioanthropological practice, for example, biodistance and phylogenetic analysis, which commonly reference aspects of tooth size and form as proxies for latent genetic information. This article provides an overview of published genealogical research, with a focus on the practical implications of quantitative genetic and environmental studies of (non)human primate dentitions. To highlight the utility of genealogical samples for understanding the influence of specific non-genetic factors on dental characters, we also present novel data on gestational hormone effects in opposite-sex dizygotic twin pairs as a test of the twin testosterone transfer (TTT) hypothesis. This article discusses fruitful next steps in genealogical dental research, as well as important ethical considerations surrounding the use of associated datasets, which are sensitive in nature. As we forge ahead in an age of phenomics, genealogical samples are likely to play a key role in generating comprehensive genotype-phenotype maps of the dentition and in refining bioanthropological methods.

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Decline in enamel hypoplasia in relation to fluoridation in Australians

Cited by 5 publications

References 15 publications

Intra‐tooth stable isotope analysis of dentine: A step toward addressing selective mortality in the reconstruction of life history in the archaeological record

Intra‐tooth stable isotope analysis of dentine: A step toward addressing selective mortality in the reconstruction of life history in the archaeological record

Correspondence between enamel hypoplasia and odontometric bilateral asymmetry in Australian twins

Integrating genealogy and dental variation: contributions to biological anthropology

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