Artículos de revistas
Anatomical Variations In Primary Teeth Microelements With Known Differences In Lead Content By Micro-synchrotron Radiation X-ray Fluorescence (μ-srxrf) - A Preliminary Study
Registro en:
Journal Of Trace Elements In Medicine And Biology. Urban Und Fischer Verlag Gmbh Und Co. Kg, v. 28, n. 2, p. 186 - 193, 2014.
0946672X
10.1016/j.jtemb.2014.01.007
2-s2.0-84898030086
Autor
de Souza-Guerra C.
Barroso R.C.
de Almeida A.P.
Peixoto I.T.A.
Moreira S.
De Sousa F.B.
Gerlach R.F.
Institución
Resumen
Shed teeth have been proposed as trace element biomarkers. This study determined variations in the spatial distribution of Ca, K, Zn, Pb, Mn, Cu, and Sr in four anatomical locations: superficial enamel (SE, 0-10. μm), subsuperficial enamel (SSE, 10-30. μm), primary dentin (PD), and secondary dentin (SD). Five primary incisors were analyzed by micro Synchrotron Radiation X-Ray Fluorescence (μ-SRXRF). Two teeth had low concentrations of lead in the SE (<250. μg/g), while three contained very high lead concentrations in the SE (>2000. μg/g). Teeth were sliced, and five spot measurements (20. μm beam diameter) were accomplished in each location. The data are shown as absolute values and as the ratio between the different elements and Ca. The distribution of K was close to that of Ca. Zn was the third most abundant element, with the highest levels being found in the SE and SD and low levels detected in the PD. Increasing Sr levels were found progressing from the enamel to the dentin, with the highest levels being found in the SD, a distribution that was unique. Pb, Mn, and Cu exhibited a similar trend, with higher signals for these elements detected in the SE. 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