Spatial distribution of trace element Ca-normalized ratios in primary and permanent human tooth enamel

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F17%3A43895593" target="_blank" >RIV/60076658:12310/17:43895593 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/17:10367097

Výsledek na webu

<a href="https://ac.els-cdn.com/S0048969717314250/1-s2.0-S0048969717314250-main.pdf?_tid=2e0fc11a-f2f6-11e7-a95c-00000aab0f27&acdnat=1515252661_e55ec570d99c6fb77488bf5333804307" target="_blank" >https://ac.els-cdn.com/S0048969717314250/1-s2.0-S0048969717314250-main.pdf?_tid=2e0fc11a-f2f6-11e7-a95c-00000aab0f27&acdnat=1515252661_e55ec570d99c6fb77488bf5333804307</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.scitotenv.2017.06.021" target="_blank" >10.1016/j.scitotenv.2017.06.021</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Spatial distribution of trace element Ca-normalized ratios in primary and permanent human tooth enamel

Popis výsledku v původním jazyce

The trace elements distribution embedded in tooth enamel offers a means to study exposure of toxicmetals and allows the reconstruction of dietary behaviors. The quantification of most of the elements with a spatial high resolution (similar to 50 mu m) is routinely achieved using laser ablation inductively coupled plasma mass spectrometry (LAICPMS). However, the lack of a comprehensive framework of trace elements distribution in enamel jeopardizes any endorsed sampling strategy using LA-ICPMS. The present work is an effort to improve our knowledge on this issue. We studied a suite of 22 sectioned teeth with known dietary history, including 12 3rd molars from 12 living individuals and 10 primary teeth from 3 living individuals. Using LA-ICPMS, we measured Ca, Cu, Zn, Ni, Sr, Ba and Pb variations along 2 or 3 rasters from cervical to occlusal enamel. Calcium concentrations are lower in primary than in permanent teeth and do not vary spatially within a tooth suggesting that enamel matures homogeneously before eruption. The Pb/Ca ratio does not vary within tooth enamel and between primary and permanent tooth enamel. The Cu/Ca and Ni/Ca ratios do not vary within tooth enamel but discriminate primary from permanent tooth enamel. The Zn/Ca ratios are higher in permanent than in primary tooth enamel, and increase up to an order of magnitude in the last hundred of microns at the enamel surface. The Sr/Ca and Ba/Ca ratios are higher in permanent than in primary tooth enamel, and decrease from the enamel-dentine junction towards outer enamel in permanent but not in primary tooth enamel. Considering the Ca-normalized intra-tooth variations of Zn, Sr and Ba, we recommend to perform laser ablation rasters along the enamel-dentine junction because this area is likely to retain most of the original and complete chemical information related to individual&apos;s life.

Název v anglickém jazyce

Spatial distribution of trace element Ca-normalized ratios in primary and permanent human tooth enamel

Popis výsledku anglicky

The trace elements distribution embedded in tooth enamel offers a means to study exposure of toxicmetals and allows the reconstruction of dietary behaviors. The quantification of most of the elements with a spatial high resolution (similar to 50 mu m) is routinely achieved using laser ablation inductively coupled plasma mass spectrometry (LAICPMS). However, the lack of a comprehensive framework of trace elements distribution in enamel jeopardizes any endorsed sampling strategy using LA-ICPMS. The present work is an effort to improve our knowledge on this issue. We studied a suite of 22 sectioned teeth with known dietary history, including 12 3rd molars from 12 living individuals and 10 primary teeth from 3 living individuals. Using LA-ICPMS, we measured Ca, Cu, Zn, Ni, Sr, Ba and Pb variations along 2 or 3 rasters from cervical to occlusal enamel. Calcium concentrations are lower in primary than in permanent teeth and do not vary spatially within a tooth suggesting that enamel matures homogeneously before eruption. The Pb/Ca ratio does not vary within tooth enamel and between primary and permanent tooth enamel. The Cu/Ca and Ni/Ca ratios do not vary within tooth enamel but discriminate primary from permanent tooth enamel. The Zn/Ca ratios are higher in permanent than in primary tooth enamel, and increase up to an order of magnitude in the last hundred of microns at the enamel surface. The Sr/Ca and Ba/Ca ratios are higher in permanent than in primary tooth enamel, and decrease from the enamel-dentine junction towards outer enamel in permanent but not in primary tooth enamel. Considering the Ca-normalized intra-tooth variations of Zn, Sr and Ba, we recommend to perform laser ablation rasters along the enamel-dentine junction because this area is likely to retain most of the original and complete chemical information related to individual&apos;s life.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10620 - Other biological topics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Science of the Total Environment

ISSN

0048-9697

e-ISSN

—

Svazek periodika

603

Číslo periodika v rámci svazku

DEC 15 2017

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

308-318

Kód UT WoS článku

000405981500033

EID výsledku v databázi Scopus

—