Poèmes

Sommer, Piotr; Felman, Dorota; Jouet, Jacques

doi:10.3917/poesi.116.0019

Cited by 2 publications

(1 citation statement)

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“…Dentin is mostly a soft tissue, in which inorganic material makes up 70%, and its structure is full of hollow tubes with a maximum size of 5 lm in length. 8,23 Micro-destructive Analysis. The LIBS spectra were obtained by using single shots with fluences slightly above the ablation thresholds of dentin and enamel respectively, with the aim to minimize damage to the samples.…”

Section: Resultsmentioning

confidence: 99%

Laser-Induced Breakdown Spectroscopy Microanalysis of Trace Elements in Homo Sapiens Teeth

2010

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Two of the main items from which to retrieve data in anthropology are teeth and bones. Identification of trace elements in their composition allows valuable information to be obtained about alimentary habits and community life conditions of groups and individuals. Conventional methods used to determine the presence of trace elements require sample preparation, with partial or total destruction of the pieces, which in most cases are unique. In this work we show the possibilities of laser-induced breakdown spectroscopy (LIBS) as a nearly nondestructive tool in anthropology and paleontology for the measurement of the presence and distribution of trace elements in teeth. We applied LIBS to the determination of strontium and magnesium in dentin and enamel of Neolithic, middle age, and modern Homo sapiens teeth. Mg/Ca and Sr/Ca distribution maps of dentin and enamel in modern teeth were created using the data obtained. Ablation threshold fluences of dentin and enamel were also measured using the photoacoustic signal induced by laser ablation. Significant variations were found in the Mg/Ca and Sr/Ca ratios in the tooth dental tissue and between the teeth of the groups and individuals studied. These results can be useful for evolutionary anthropology studies as they can provide information regarding early nutrition, seasonality, and residential mobility.

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Section: Resultsmentioning

confidence: 99%