Incremental Structures in Teeth

Antoine, Daniel J.; FitzGerald, Charles; Rose, Jerome C.

doi:10.1002/9781119151647.ch7

Cited by 2 publications

(3 citation statements)

References 113 publications

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“…Disruptions to amelogenesis can result in accentuated lines (ALs) that are visible in thin sections under light microscopy, commonly referred to as Wilson bands, accentuated brown striae, or ALs (Aris, 2020;Austin et al, 2023;FitzGerald & Saunders, 2005;Rose et al, 1978Rose et al, , 1984Wilson & Shroff, 1970). These bands may or may not correspond with an enamel surface defect (Goodman & Rose, 1990;Mahoney et al, 2017;Witzel et al, 2008) and can be distinguished from Retzius lines as they are irregular in width, darker, and visible along more of their length between the dentinoenamel junction (DEJ) and the enamel surface (Figure 2c) and may not correlate with regular Retzius line spacing (Antoine et al, 2019;Goodman & Rose, 1990). As not all accentuated striae in this study are correlated with a surface defect, the term "accentuated line" (AL) will be used throughout when describing potential indicators of episodes of physiological stress during amelogenesis.…”

Section: Enamel Developmentmentioning

confidence: 99%

Nostalgia for the old country—A histological exploration of early childhood physiological stress experiences in colonial Otago, New Zealand

Kavale‐Henderson,

Buckley,

King

et al. 2024

Intl J of Osteoarchaeology

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Many mid‐19th‐century immigrants to New Zealand are presumed to have been in pursuit of a “better life” than was achievable in their origin countries. Here, we utilize histological analyses of internal indicators of enamel growth disruption (accentuated lines [ALs]) in 19 European and Chinese immigrants and five colony‐born children from three 19th‐century Otago sites. Observations of regular enamel microstructure were used to estimate a chronology of periods of enamel growth disruption. Clear or potential ALs were present in 18/19 (95%) adults and 4/5 (80%) subadults. Mean occurrence of ALs was higher in Chinese individuals than in European individuals between birth and 1 year of age (Chinese mean = 11; European mean = 3.8) and between 3 and 5 years of age (Chinese mean = 12.7; European mean = 1.3). Potential prenatal ALs were observed in three colony‐born children. Although similar stressors such as malnutrition and infectious disease would have been present in both Europe and China, their expression in these individuals may reflect the embodiment of different push factors that stimulated emigration to New World colonies such as New Zealand. The presence of ALs in colony‐born children indicates some continuation of developmental stressors in New Zealand. The results presented here highlight the value of utilizing microscopic analyses on poorly preserved archeological samples that are frequently excluded from histological examination. This preliminary glimpse into enamel formation disruption challenges the ubiquitous 19th‐century narrative of New Zealand as free from the hardships of industrial revolution era Europe and sheds light on the stresses of childhoods spent in rural China and the potential attractions of the Pacific goldfields in comparison. Future work with larger sample sizes will contribute to a critical exploration of experiences of childhood physiological stress in those who lived and died in colonial New Zealand.

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Section: Enamel Developmentmentioning

confidence: 99%

Nostalgia for the old country—A histological exploration of early childhood physiological stress experiences in colonial Otago, New Zealand

Kavale‐Henderson,

Buckley,

King

et al. 2024

Intl J of Osteoarchaeology

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“…Se buscaron áreas de disminución en el espesor del esmalte o hipoplasias y se estimó el momento de su formación. Estas alteraciones se producen durante el proceso de mineralización y se relacionan con interrupciones fisiológicas en la secreción de la matriz dentaria, por lo que son consideradas indicadores generales de estrés metabólico (Antoine, FitzGerald y Rose, 2019;Armelagos, Goodman, Harper y Blakey, 2009). Se buscó la presencia de lesiones óseas en las superficies de los restos esqueletarios del individuo y se realizaron radiografías con el objeto de observar la presencia de líneas transversales de radiopacidad aumentada o líneas Tabla 2.…”

Section: Metodologíaunclassified

“…Dada la regularidad del proceso de formación dentaria y la falta de remodelación del tejido, es posible identificar el momento específico en el que ocurrió el defecto del esmalte (Antoine et al, 2019). En este sentido, las hipoplasias observadas en el individuo B ocurrieron en etapas tempranas de la formación de la corona dentaria, pudiendo ubicarlas cronológicamente en el período fetal tardío y las primeras semanas de vida posnatal.…”

Section: El Individuo B Preservaciónunclassified

Aportes a la historia de vida y muerte de un infante en el Formativo Superior (400 –1000 D.C.) en Quebrada del Toro, Salta

2020

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Este trabajo presenta información sobre la historia de vida y muerte de un individuo infantil recuperado en un contexto de inhumación en Quebrada del Toro (Salta), asignable cronológicamente al Período Formativo Superior. Se analizan variables culturales como el tipo de estructura de inhumación, disposición en el espacio y acompañamiento. Se realiza un análisis bioantropológico de los restos esqueléticos y dentarios con el propósito de reconstruir el perfil biológico individual, evaluar el crecimiento y estado general de salud y registrar e interpretar condiciones patológicas. Asimismo, se estudian modificaciones del cuerpo en vida y tratamiento post mortem. El individuo B falleció alrededor de los 13 meses postnatales y en su esqueleto y dentición se encontraron defectos en la mineralización del esmalte, lesiones porosas y formación de hueso nuevo en cráneo y postcráneo. Estas lesiones se interpretaron como producto de enfermedades metabólicas causadas por deficiencias nutricionales, particularmente escorbuto. Estos resultados son discutidos en el marco de información disponible para el sitio y período considerados.

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Incremental Structures in Teeth

Cited by 2 publications

References 113 publications

Nostalgia for the old country—A histological exploration of early childhood physiological stress experiences in colonial Otago, New Zealand

Nostalgia for the old country—A histological exploration of early childhood physiological stress experiences in colonial Otago, New Zealand

Aportes a la historia de vida y muerte de un infante en el Formativo Superior (400 –1000 D.C.) en Quebrada del Toro, Salta

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